Related Clues:

• Constant interrupter
• Persistent annoyer
• Fatuous fool
• Bothersome one
• Horse relative
• Slow equine
• Surefooted critter
• Bothersome type
• Mule's dad
• Genuine nuisance
• Telemarketer, perhaps
• Stubborn critter
• Impertinent sort
• Brat or bug, e.g.
• Gnat or brat