Clean a lottery (5)
I believe the answer is:
sweep
I believe this is a double definition.
'clean' is the first definition.
(I know that sweep is a type of clean)
'a lottery' is the second definition.
(I've seen this before)
(Other definitions for sweep that I've seen before include "if clean, could result in a whitewash" , "Stroke at the crease" , "Grimes, say" , "Dust" , "long movement" .)