Bagatelle (6)
I believe the answer is:
trifle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bagatelle</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 trifle that I've seen before include "Filter (anag.)" , "A little thing for the pudding" , "Small amount; dessert" , "Insignificant item - dessert" , "A small portion" .)