Decorate food (7)
I believe the answer is:
garnish
'decorate food' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for garnish that I've seen before include "Decorate food for sharing" , "Add a trimming to a dish" , "Sharing (anag) - dress" , "Adorn a dish" , "extra on plate" .)