Roaster (4)
I believe the answer is:
oven
'roaster' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oven that I've seen before include "You can cook in this" , "Kiln, perhaps" , "Enclosed chamber for cooking" , "It''s used for baking or roasting" , "Small kiln" .)