Floor washer (3)
I believe the answer is:
mop
'floor washer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mop that I've seen before include "Floor cleaner" , "Implement for washing floor" , "Finish off a task - . . . up" , "It's used to wipe the floor" , "Polish" .)