Triangular roof end (5)
I believe the answer is:
gable
'triangular roof end' is the definition.
(I've seen this before)
This is all the clue.
(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" .)