One-room flat (6)
I believe the answer is:
bedsit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one-room flat</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 bedsit that I've seen before include "One-room apartment" , "Single room lodging" , "Small flat" , "rented accommodation" , "One-room flat" .)