Window cleaner (8)
I believe the answer is:
squeegee
'window cleaner' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for squeegee that I've seen before include "Rubber-edged gizmo for cleaning windows" , "Window cleaner's rubber-edged tool" , "Window wiper" , "Instrument for removing water and dirt from windows and floors" , "Window wipe" .)