Communal bedroom (4)
I believe the answer is:
dorm
'communal bedroom' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for dorm that I've seen before include "Rest area" , "Communal bedroom in boarding school" , "Communal sleeping place (colloq.)" , "Place to retire" , "Boarding school bedroom (abbr)" .)