The specific term 'flame haired vixen' - to me is a specific image. A cliche' if you will. Nothing wrong with that - It just tells the reader that you're writing in cliche's. They'll draw their own conclusions from it. Good or bad.
Being specific in character description - has it's place. Obviously if a particular character trait is essential to the storyline, you include it. Is the character a seven foot tall albino? Does he NEED to be? Can the same role be played by a five foot tall woman?
I recently completed a noir film play. Edgy, controversial, dark, twisted stuff. As I was sketching in each character, I completely avoided a description of race, or age. I admit, this is the first time I've done this. And I found it liberating. Sure, I had a vision in my mind of how each character looked. And I described them as they appeared. But I found that the description of their appearance, imparted character.
SAM BOLDWIN drains the remains in one gulp. He rubs his greying temples and reaches for the prescription bottle by the nightstand. (This role could be played by a man in his forties through fifties. All that is required as stated later in the script, is that "He's in great shape, for a man his age".)
Later, at the convenience store, he meets
YOUNG GIRL standing next to him. She has Disney eyes and filthy hair. She wears mis-matched pajama top and bottoms. (I've had readers see her as young as 5 or as old as 9)
(We learn her NAME the first time she speaks. Because that's when it's needed)
THE MOM - it's unclear if the hot Mom is wearing anything under the old coat. If she is, it's an awfully short skirt. (She's in that 'ageless' phase. Could be 18... could be 28)
Later in the script, Sam says to a character "Hell, she's half my age" about the mom. Also, it appears as if 'she's too young to have born that child'... which makes us wonder HOW old she is... and if she's the mother.
Even later, when the bad guys show up, I describe some of them by appearance only. "THE BEARD" "FAT BOY" and so on. Because that makes them HAVE an appearance in the reader's mind, but their names aren't ever needed or heard.
I've sent it to some producer's and directors, the feedback is consistently positive on these choices. "I love how it's multi-racial" says one. "I love how you've got this whole white trash thing going" says another. The point is, THEY cast the actors in their mind's eye. I gave the characters, CHARACTER.