Space under a roof (4)
I believe the answer is:
loft
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">space under a roof</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for loft that I've seen before include "Uppermost room" , "Attic" , "Backward slope in face of golf club" , "Roof space area" , "Kick high in the air" .)