Trivial lie (3)
I believe the answer is:
fib
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">trivial lie</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 fib that I've seen before include "minor piece of fiction" , "Trivial lie" , "Story" , "Petty falsehood" , "Little white lie" .)