Related Clues:

• Mule's papa
• Equine beast
• Fabled beast
• Jawbone provider, in the Bible
• Jawbone source for Samson's weapon
• Biblical rebuker of Balaam
• Pitiable fool
• Jenny or jack
• Symbol of inflexibility
• Clot
• Utter doofus
• Palm Sunday transportation
• Low-emission transport?
• Pack bearer
• Arizona pack animal