Related Clues:

• Not of sound mind
• Cracked engine
• Eccentric boasted when cutting southern Yankee
• Nero's place
• Crazy in Chihuahua
• Crazy, down south
• Motive start?
• Word attached to ''motion''
• Like Marx Brothers humor
• Like slapstick humor
• Like the Marx Brothers' humor
• Wild and crazy, as the Three Stooges
• Word attached to "motion"
• Wild and wacky
• Insane, south of the border