Brown closure on Indian oven (7)
I believe the answer is:
tandoor
'indian oven' is the definition.
(I've seen this before)
'brown closure' is the wordplay.
'brown' becomes 'tan' (tan is a kind of brown).
'closure' becomes 'door' (I can't explain this - if you can you should believe this answer much more).
'tan'+'door'='TANDOOR'
'on' is the link.
Can you help me to learn more?
(Other definitions for tandoor that I've seen before include "Indian oven" , "Clay oven" , "It has food cooked" .)