Female with fantastic features (4)
I believe the answer is:
face
'features' is the definition.
(facial features)
'female with fantastic' is the wordplay.
'female' becomes 'f' (common abbreviation).
'with' is a charade indicator (letters next to each other).
'fantastic' becomes 'ace' (ace can informally mean very good).
'f'+'ace'='FACE'
(Other definitions for face that I've seen before include "Countenance, visage" , "steep side of mountain" , "Confront - mug (slang)" , "Front -- confront" , "Watch's dial" .)