Small appetizer (6)
I believe the answer is:
canape
'small appetizer' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for canape that I've seen before include "Light refreshment" , "Small biscuit with savoury on top" , "cocktail treat" , "Savoury appetiser, often accompanied by Champagne" , "Party nibble" .)