Eave (8)
I believe the answer is:
overhang
'eave' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for overhang that I've seen before include "Extend beyond (a roof, perhaps)" , "Project, beetle" , "Lean out beyond the vertical" , "Projecting part" , "Cast a shadow" .)