Here be parse ...
1a - SECT (charade)
Party time and time again? (4)
party - definition
time and time again - SEC & T
? - for two times in one go.
(SEC)(T)
3a - BLACK MARIA (charade)
Prison transport woman out of West Side on jet (5,5)
prison transport - definition
woman out of West Side - MARIA (WSS)
on - positional indicator (on in an across clue means after)
jet - BLACK
(BLACK)(MARIA)
10a - AGAINST (charade)
V&A acquires original piece from Tiffany's (7)
V - definition
& - equivalence link
A - A
acquires - GAINS
original piece from - first letter indicator
tiffany's - first letter fodder
(A)(GAINS)(T)
11a - FUSSPOT (charade)
Old woman with trouble getting weed (7)
old woman - definition
with - first part of positional link
trouble - FUSS
getting - second part of positional link
weed - POT
(FUSS)(POT)
12a - FASHION DESIGNER (anagram)
I heard fine songs upset one like McCartney (7,8)
i heard fine songs - anagram fodder
upset - anagram indicator
one like - definition by example indicator
McCartney - definition (Stella, not Paul)
(FASHION DESIGNER*)
13a - DRENCH (letter exchange)
Thoroughly wet channel head replaced by director (6)
thoroughly wet - definition
channel - TRENCH
head replaced by director - first letter exchange indicator for D
(-t+D)(RENCH)
14a - ONANISTS (&lit)
Number seen around nasty stains? (8)
number - NO
seen around - reversal indicator
nasty - anagram indicator
stains - anagram fodder
Overarching def is a number of people seen around the result of wanking are likely to be wankers.
(ON<)(ANISTS*)
17a - ASSAILED (anagram)
Ales said to be "revolutionary" slated (8)
ales said - anagram fodder
to be revolutionary
slated - definition
(ASSAILED*)
18a - BOTTOM (pun)
Part which could be pinched by an understudy? (6)
Play on an arse being pinched and the Shakespearean MSND role being pinched.
21a - HOLDING PATTERNS (cryptic definition)
In which crates are stacked up by the tower? (7,8)
Misdirect to a warehouse where crates are stacked up in a tower. Crate = planes, a stack-up is where planes go in a holding pattern, the tower is an aircraft control tower.
23a - IN A DAZE (charade homophone)
Stunned at a broadcast of 'Monday, Monday'? (2,1,4)
stunned - definition
at - IN
a - A
broadcast of - homophone indicator
monday monday? - DAYS
(IN)(A)("DAZE")
24a - PROFILE (reversal insertion)
Side in favour of turning in stack of cash (7)
side - definition
in favour of - FOR
turning - reversal indicator
in - insertion indicator
stack of cash - PILE
(P(ROF)ILE)
25a - TENDERNESS (semi&lit)
Head nurse put forward a case for this (10)
haed - NESS
nurse - TENDER
put forward - positional indicator
a case for this - last of def (case can be read as patient or as an argument)
Overarching def, the nurse is promoting tenderness should be used on ward, or she is putting forward a patient to a doctor because of them feeling a tenderness.
(TENDER)(NESS)
26a - BEER (charade)
Live right on one drug or another (4)
live - BE
right - R
on - positional link
one drug - E
or - referal definition link
another - definition (referring back to drug)
(BE)(E)(R)
1d - SCARFED (surround)
Son, worried about female, ate quickly (7)
son - S
worried - CARED
about - surround indicator
female - F
ate quickly - definition
(S+CAR(F)ED)
2d - CLASSLESS (insertion)
Egalitarian girl opening college bar (9)
egalitarian - definition (wordweb)
girl - LASS
opening - insertion indicator
college - C
bar - LESS
(C(LASS)LESS)
4d - LATENT (reversal charade)
A large set-up big top concealed (6)
A large - A L & reversla fodder
set-up - reversal indicator (I use hyphen wordsplits)
big top - TENT
concealed - definition
(L+A<)(TENT)
5d - CAFFEINE (cryptic definition)
Joe's full of it and it really gets me going! (8)
Misdirect to a bloke full of shit and it annoying me. Joe = coffee, gets me going! = effect of caffeine.
6d - MISSION CONTROL (anagram)
Corn limits soon to be raised in Houston? (7,7)
corn limits soon - anagram fodder
to be raised - anagram indicator
in - definition link
Houston? - definition by example
(MISSION CONTROL*)
7d - RIPEN (odd/even charade)
Mature druid fruit regularly seen on stall (5)
mature - definition
druid - regular fodder
regularly seen - odd/even indicator
on - positional indicator
stall - PEN
(d(R)u(I)d)(PEN)
8d - ANTARES (charade subtraction)
Star worker in need of a short break (7)
star - definition
worker - ANT
in need of - positional indicator (requires)
a - A
short - last letter deletion indicator
break - REST & last letter deletion fodder
(ANT)(A)(RES)t)
9d - INDISCRIMINATE (insertion)
Did Hoskins & Son cut charge for wholesale? (14)
did - D
hoskins - I
& - inclusion link
son - S
cut - insertion indicator (A B and C cut D)
charge - INCRIMINATE
for - definition link
wholesale? - definition
(IN(D+I+S)CRIMINATE)
15d - SATURNINE (word split insertion surround)
Go insane after divorce without one's bitter (9)
go - TURN
insane - word split fodder & TURN insertion into SANE indicator
after divorce - word split indicator
without - surround indicator
one - I
is - definition link
bitter - definition
(SA(TURN)(I)NE)
16d - PEA GREEN (surround)
Writer to cover match in Hue (3,5)
writer - PEN
to cover - surround indicator
match - AGREE
in - definition link
hue - definition
(PE(AGREE)N)
17d - ATHEIST (charade)
I don't believe a man who says God exists (7)
i don;t believe - definition
a - A
man who says god exists - THEIST
(A)(THEIST)
19d - MASSEUR (charade reversal)
At church service, regret blowing up rubber (7)
At - positional indicator
church service - MASS
regret - RUE
blowing up - reversal indicator
rubber - definition
(MASS)(EUR<)
20d - PAMPAS (reversal)
Grass idiot up after revolutionary plot (6)
grass - definition
idiot - SAP
up - reversal indicator
after - positional indicator
revolutionary - reversal indicator
plot - MAP
(PAM<)(PAS<)
22d - LEARN (insertion)
Pick up Listener to fill in Latin name (5)
pick up - definition
listener - EAR
to fill in - insertion indicator
latin - L
name - N
(L(EAR)N)
Cheers for playing - if you have any comments/queries feel free to add them here or PM me. Next XWD to be posted here on May 1st.