Whitewash clothes (7)
I believe the answer is:
clobber
This clue is a double definition.
'whitewash' is the first definition.
(thesaurus)
'clothes' is the second definition.
(thesaurus)
(Other definitions for clobber that I've seen before include "Clothes; to beat, criticise (slang)" , "Repeatedly hit" , "duds" , "Clothes - hit" , "Clothes and accessories" .)