Brag without starting oven (4)
I believe the answer is:
oast
'oven' is the definition.
(type of kiln)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for oast that I've seen before include "Hop-drier" , "Where to cook" , "Kiln for drying hops or malt" , "Hop-kiln" , "Hop drying kiln" .)