Cleansing (7)
I believe the answer is:
washing
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cleansing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(washing is a kind of cleansing)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for washing that I've seen before include "Cleaning with soap and water" , "Cleaning - laundry" , "Cleansing" , "(and 18) Domestic appliance" .)