Short joke (3-5)
I believe the answer is:
one-liner
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">short joke</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 one-liner that I've seen before include "Quick joke?" , "Witty remark in single short sentence" , "Witty remark contained in a single sentence" , "Terse joke" , "Witty remark consisting of a short sentence" .)