Swiss cheese with small holes (7)
I believe the answer is:
gruyere
'swiss cheese with small holes' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for gruyere that I've seen before include "Hard yellow Swiss cheese" , "Firm pale cheese with holes" , "Whole-milk Swiss cheese" , "Type of Swiss cheese" , "Whole-milk holey cheese" .)