Haphazardness (12)
I believe the answer is:
irregularity
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">haphazardness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for irregularity that I've seen before include "Fluctuation" , "Something breaking the usual rules" , "Abnormality" .)