Related Clues:

• Gray matter
• Repartee
• "I'm at my ___ end!"
• Canniness
• Hurts
• Oscar Wilde, notably
• Clever humor
• Comical sort
•     'Cultured insolence,' according to Aristotle
• Mental capacity
• Mental faculties
• Will Rogers forte
• Clever sort
• Mental keenness
• Mother __