Half-truth (3)
I believe the answer is:
fib
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">half-truth</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for fib that I've seen before include "A harmless white lie" , "Trivial lie" , "minor piece of fiction" , "One must be 20 [UNTRUE]" , "Small lie" .)