Possible Clues:

• Many a joke involves one
• Gent following such wordplay must be sharp
• That would be a funny sort of gent - quite a stinker
• Riddle's punch line, often
• A humorous play on words
• Wordplayer's ploy
• It may involve a homophone
• 'Queen of denial' for Queen of the Nile
• That gent Crosaire could be that sort of stinker
• The sort of gent that Crosaire is - a bit of a stinker