Sweet or chilli pepper (8)
I believe the answer is:
capsicum
'sweet or chilli pepper' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for capsicum that I've seen before include "hot stuff perhaps" , "Sweet or chilli pepper" , "Pepper plant" , "something pungent" , "Tropical plant producing peppers -- music cap (anag)" .)