Roof edge (5)
I believe the answer is:
eaves
'roof edge' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for eaves that I've seen before include "what might constitute a hangover?" , "Overhanging roof edges" , "Overhanging part of roof" , "Overhanging edge of roof" , "Section of roof" .)