Small appetiser (6)
I believe the answer is:
canape
'small appetiser' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for canape that I've seen before include "Savoury mouthful" , "Small biscuit with savoury on top" , "part of a buffet?" , "Small thing to eat with a drink" , "Bite-sized party food" .)