Related Clues:

• Burro
• Stupid person
• Leather source
• Pack carrier
• Balaam's transport
• Symbol of stubbornness
• Onager, for one
• Brown Swiss, e.g.
• Cart puller
• Whale of a mom
• Silly sort
• Container of fresh milk
• Silly fool
• Sure-footed domesticated mammal
• Foolish sort