Jellied garnish (5)
I believe the answer is:
aspic
'jellied garnish' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aspic that I've seen before include "Setter" , "Savoury jelly for coating meats and eggs" , "Savoury jelly for coating meat, eggs etc" , "Jelly based on fish or meat stock" , "Stock set with food" .)