Triangular roof end (5)
I believe the answer is:
gable
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">triangular 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 "Part between sloping sides of a roof" , "Triangular part of a wall supporting a ridged roof" , "Filmstar at the side of the house?" , "Side of house or Clark, film star" , "Triangular brickwork" .)