Humorous remark (10)
I believe the answer is:
pleasantry
'humorous remark' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pleasantry that I've seen before include "Joke, banter" , "Jocular comment" , "Source of laughter" , "facetious trick" , "Humorous style" .)