Tapenade ingredient (5)
I believe the answer is:
olive
'tapenade ingredient' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for olive that I've seen before include "Bitter fruit" , "Stoned fruit" , "Small green tree-fruit, nice in martini" , "Fruit; Popeye's girlfriend" , "Greyish-green colour" .)