Briefly get gnat off cheese (4)
I believe the answer is:
brie
'cheese' is the definition.
(Brie is an example)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for brie that I've seen before include "dairy product" , "Prov. squalid place" , "Round soft Fr. cheese" , "Kind of soft cheese" , "Variety of cheese" .)