Removing impurities (9)
I believe the answer is:
cleansing
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">removing impurities</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cleansing that I've seen before include "Purging" , "Nice slang for making thoroughly free from dirt (9)" .)