Agreeable remark (10)
I believe the answer is:
pleasantry
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">agreeable remark</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pleasantry that I've seen before include "jocularity" , "Jocular comment" , "An agreeable remark" , "Sally" , "Humorous style" .)