Place for proofs (6)
I believe the answer is:
galley
'place for proofs' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for galley that I've seen before include "Oared ship - ship's kitchen" , "Vessel's kitchen" , "Kitchen on ship or aircraft" , "On-board cooking area" , "Kitchen on board" .)