A trifle (7)
I believe the answer is:
nothing
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a trifle</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for nothing that I've seen before include "can mean love" , "Zero, naught" , "Duck" , "What's in a vacuum?" , "signifying love" .)