Scrub; search (5)
I believe the answer is:
scour
This clue is a double definition.
'scrub' is the first definition.
(I know that scrub can be written as scour)
'search' is the second definition.
(I know that scour is a more specific form of the action search)
(Other definitions for scour that I've seen before include "Attack with brush" , "Rub hard or search thoroughly" , "search in detail" , "Clean - scout" , "Clean by rubbing with an abrasive" .)