Roughly at three, drama staged here (7)
I believe the answer is:
theatre
'drama staged here' is the definition.
(place to see a drama or play)
'roughly at three' is the wordplay.
'roughly' indicates an anagram.
'at'+'three'='atthree'
'atthree' anagrammed gives 'THEATRE'.
(Other definitions for theatre that I've seen before include "where you may get knifed" , "Building for the dramatic arts" , "(Military) field of action" , "Room for surgery" , "eg The Globe" .)