Powder room (3)
I believe the answer is:
loo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">powder room</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for loo that I've seen before include "Lavatory - old card game" , "Rest room" , "A colloquial toilet" , "Privy" , "bog" .)