Things lying about untidily (7)
I believe the answer is:
clutter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">things lying about untidily</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for clutter that I've seen before include "Untidy mess" , "Untidy lot of objects in room" , "Confused muddle of things" , "Disorderly mess" , "Things lying about untidily" .)