Almost a spicy jelly (5)
I believe the answer is:
aspic
'jelly' is the definition.
(I know that aspic is a type of aspic)
'almost a spicy' is the wordplay.
'almost' means to remove the last letter (almost the whole word is kept).
'a'+'spicy'='aspicy'
'aspicy' with its last letter taken away is 'ASPIC'.
(Other definitions for aspic that I've seen before include "garnish" , "that's clear?" , "stock production" , "Clear savoury jelly" , "Savoury meat or fish jelly" .)