Dairy product perfect female fed to vampire? (9)
I believe the answer is:
butterfat
'dairy product' is the definition.
(I've seen this before)
'perfect female fed to vampire?' is the wordplay.
'perfect' becomes 'utter' (synonyms).
'female' becomes 'f' (common abbreviation).
'fed to' indicates putting letters inside.
'vampire?' becomes 'bat' (vampire bat).
'utter'+'f'='utterf'
'utterf' put within 'bat' is 'BUTTERFAT'.
(Other definitions for butterfat that I've seen before include "Ingredient of milk" , "Dairy product" .)