Italian aperitif (7)
I believe the answer is:
campari
'italian aperitif' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for campari that I've seen before include "Pinkish aperitif" , "Mildly bitter aperitif, often drunk with soda" , "bitter drink" , "Red, bitter-sweet Italian aperitif" .)