Eastern warehouse or storeroom (6)
I believe the answer is:
godown
I believe this clue is a double definition.
'eastern warehouse' is the first definition.
(I've seen this before)
'storeroom' is the second definition.
(thesaurus)
'or' acts as a link.
(Other definitions for godown that I've seen before include "Leave university" , "storage facility in India" , "eastern warehouse" .)