Oven is only partially used for meat (7)
I believe the answer is:
venison
'meat' is the definition.
(venison is a kind of meat)
'oven is only partially' is the wordplay.
'partially' indicates a hidden word.
'VENISON' is hidden in the letters of 'oven is only'.
'used for' is the link.
(Other definitions for venison that I've seen before include "Game" , "Deer meat" , "Deer (as food)" , "Meat - in ovens (anag)" , "Flesh of deer" .)