For every aperitif has it (3)
I believe the answer is:
per
'for every' is the definition.
(I've seen this before)
'aperitif has it' is the wordplay.
'has it' says the answer is hidden in the clue.
'PER' is hidden in the letters of 'aperitif'.
(Other definitions for per that I've seen before include "For each or every" , "Preposition indicating by means of" , "Preposition meaning for each" , "According to" .)