Dirtiness (5)
I believe the answer is:
filth
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dirtiness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(filth is a kind of dirtiness)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for filth that I've seen before include "Muck" , "Squalor" , "Carrion" , "Repulsive dirt" , "Disgusting dirt or obscenity" .)