Use the oven (4)
I believe the answer is:
bake
'use the oven' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bake that I've seen before include "Cook (cakes, etc)" , "Cook by dry heat in an oven" , "Cook in a hot oven" , "Biscuit" , "Cook (eg, cakes)" .)