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