A largely savoury meat jelly (5)
I believe the answer is:
aspic
'meat jelly' is the definition.
(I've seen this before)
'a largely savoury' is the wordplay.
'largely' means to remove the last letter.
'savoury' becomes 'spicy' (synonyms).
'spicy' with its last letter taken off is 'spic'.
'a'+'spic'='ASPIC'
(Other definitions for aspic that I've seen before include "Setter" , "Savoury jelly for coating meat, eggs etc" , "Clear savoury jelly" , "Lavender" , "Ending of Marlowe's thriller" .)