Roof end (5)
I believe the answer is:
gable
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">roof end</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 gable that I've seen before include "Triangular brickwork" , "US actor" , "Triangular top of side wall" , "Triangular part of a wall supporting a ridged roof" , "Part of house" .)