Aspic ordered with pepper (8)
I believe the answer is:
'pepper' is the definition.
(I know that pepper can be written as capsicum)
'aspic ordered with' is the wordplay.
'ordered' indicates anagramming the letters.
'with' becomes 'cum' (I've seen this in other clues).
'aspic' anagrammed gives 'capsi'.
(Other definitions for capsicum that I've seen before include "Chili pepper genus" , "hot stuff perhaps" , "Fruit crop" , "Pepper fruit" , "Pepper plant" .)