Pasta topping (8)
I believe the answer is:
parmesan
'pasta topping' is the definition.
(parmesan cheese may be added to pasta)
This is all the clue.
(Other definitions for parmesan that I've seen before include "Italian cheese for spearman" , "Spearman (anag) - cheese" , "Hard dry Italian cheese" , "that grates" , "Cheese for grating" .)