Related Clues:

• Dorothy Parker had it
• Acumen
• Swift gift
• Sarcasm, e.g.
• Ad-libber's asset
• 'Hipster Handbook' subject
• Funny person
• Comedian's asset
• Jon Stewart asset
• Vonnegut device
• Talent for banter
• O. Henry forte
• ''Educated insolence,'' to Aristotle
• It can feature a twist
• Humour