Collected dust (3)
I believe the answer is:
sat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">collected dust</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sat that I've seen before include "Took a chair" , "twenty-four hours" , "Was in session" , "Posed (for an artist)" , "Took a seat and posed for a portrait" .)