Tupperware topper (3)
I believe the answer is:
lid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tupperware topper</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 lid that I've seen before include "Bottle or jar top" , "Covering" , "Hat" , "Top or cover" , "Cover from gliders" .)