Related Clues:

• No Mensa member
• Kind of box
• Dumb bunny
• Dum-dum
• Foolish person
• Hardly a brainiac
• Dullard
• One wearing a conical cap
• Dostoyevsky title character
• Slow one
• Dostoyevsky character
• Dingbat
• Bird that's more than rare
• Word said with a head slap
• Dostoyevsky's "The ___"