Taco topping (5)
I believe the answer is:
salsa
'taco topping' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for salsa that I've seen before include "Latin American dance - spicy Mexican sauce" , "fling?" , "This could be hot" , "Spicy tomato sauce" , "Tomato relish" .)