Communal dining hall (9)
I believe the answer is:
refectory
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">communal dining hall</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for refectory that I've seen before include "dining area" , "Monastic dining hall" , "Communal dining room" , "Communal room for meals" , "Communal dining hall" .)