Cleaner oar (5)
I believe the answer is:
sweep
I believe this is a double definition.
'cleaner' is the first definition.
(sweep is a kind of cleaner)
'oar' is the second definition.
(I know that sweep is a type of oar)
(Other definitions for sweep that I've seen before include "Clean by brushing" , "do cleaning" , "Dust" , "Prize draw" , "range" .)