Greek salad cheese (4)
I believe the answer is:
feta
'greek salad cheese' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for feta that I've seen before include "Goat's or sheep's milk cheese" , "Crumbly Greek cheese" , "Greek sheep or goats' cheese" , "Greek dairy product" , "A ewe's, goat's milk cheese" .)