Meat in oven's cooking (7)
I believe the answer is:
venison
'meat' is the definition.
(venison is a kind of meat)
'in oven's cooking' is the wordplay.
'cooking' is an anagram indicator.
'in'+'ovens'='inovens'
'inovens' anagrammed gives 'VENISON'.
(Other definitions for venison that I've seen before include "Deer (as food)" , "Deer meat" , "Flesh of deer" , "Game" , "Meat - in ovens (anag)" .)