Hall or lobby (5)
I believe the answer is:
foyer
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">hall</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">lobby</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for foyer that I've seen before include "Theatre public area" , "Entrance hallway" , "Reception lobby" , "Theatre's entrance hall" , "Anteroom" .)