Jelly (5)
I believe the answer is:
aspic
'jelly' is the definition.
(I know that aspic is a type of jelly)
This is all the clue.
(Other definitions for aspic that I've seen before include "Savoury jelly for meat or vegetable" , "Edible jelly" , "that's clear?" , "Savoury relish" , "Lavender" .)