Marks (6)
I believe the answer is:
stains
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">marks</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know this)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stains that I've seen before include "Discolorations or blemishes" , "Dirty marks" , "Black marks for saints" , "Discolorations on satins" , "Discolorations or dirt marks" .)