Slice in a salad, maybe (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
feta
(Other definitions for feta that I've seen before include "Goat's or sheep's milk cheese" , "Salty goat or sheep milk cheese" , "Crumbly Greek cheese" , "Eastern Mediterranean cheese" , "10 down cheese" .)