She has dark hair (8)
I believe the answer is:
brunette
'she has dark hair' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for brunette that I've seen before include "Unpreferred female" , "One having dark brown hair" , "She's certainly not a blonde" , "Girl with dark brown hair" , "She's certainly not blond" .)