Basement (6)
I believe the answer is:
cellar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">basement</span>' is the definition.<br/ ><span class="explanation-format__explanation">(basement room)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cellar that I've seen before include "Underground store room" , "Where to find wine" , "It holds wine (or salt)" , "Place for wine" , "Room where wine is stored (6)," .)