Gorge on cheese (7)
I believe the answer is:
cheddar
I believe this clue is a double definition.
'gorge' is the first definition.
(Cheddar Gorge in Somerset)
'cheese' is the second definition.
(I know this)
'on' is the link.
(Other definitions for cheddar that I've seen before include "Mendip gorge" , "Somerset village" , "Firm cheese as made in Somerset" , "Cheese; Somerset town" , "Hard 8 across" .)