Laundry problem
I believe the answer is:
stain
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">laundry problem</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 stain that I've seen before include "Blemish; colour (wood)" , "Discolouring mark" , "Satin (anag.)" , "Discoloration" , "Discoloured patch" .)