Search; clean (5)
I believe the answer is:
scour
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">search</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that scour is a more specific form of the action search)</span><br/ ><br/ >'<span class="explanation-format__original">clean</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for scour that I've seen before include "scrub and scrape" , "Comb" , "Attack with brush" , "Rub hard or search thoroughly" , "Hunt through" .)