Clutter, disorder (4)

I believe the answer is:
mess
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">clutter</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">disorder</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(mess is a kind of disorder)</span><br/ ><br/ ></span>
(Other definitions for mess that I've seen before include "Untidy confusion" , "Where one might eat" , "Untidy muddle" , "Eating place" , "Military dining area" .)