Brick oven (4)
I believe the answer is:
kiln
'brick oven' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for kiln that I've seen before include "Hops or pottery cooker?" , "Drying furnace" , "Industrial furnace" , "Large oven for baking pottery" , "Oven for burning lime" .)