Witty remark or joke (9)
I believe the answer is:
wisecrack
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">witty remark</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">joke</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for wisecrack that I've seen before include "Witty comment" , "Flippant remark" , "Sally" , "funny remark" , "Spoken witticism" .)