A clever or witty remark
[PAR] Epigram: A concise, clever, often paradoxical statement, thought or observation; 
... Quip: A clever or witty observation or remark, with a tendency to descend into... [DOC] [TLE] WITTY REMARK - crossword answers, clues, definition, synonyms ... [PAR] Crossword Solver - Crossword Clues, synonyms, anagrams and definition of witty 
remark.