Aspic possibly combined with pepper (8)
I believe the answer is:
capsicum
'pepper' is the definition.
('capsicum' can be a synonym of 'pepper')
'aspic possibly combined with' is the wordplay.
'possibly' is an anagram indicator.
'combined with' becomes 'cum' (I've seen this before).
'aspic' anagrammed gives 'capsi'.
'capsi'+'cum'='CAPSICUM'
(Other definitions for capsicum that I've seen before include "Fruit crop" , "vegetable?" , "seeds" , "Sweet or chilli pepper" , "Chili pepper genus" .)