Related Clues:

• Harpy
• Be fretful
• Pester continuously
• Sick bay?
• Continuously bother
• Lose sleep over (with "about")
• Pony
• Badger, so to speak
• No thoroughbred
• Grouse like a spouse
• Find fault to a fault
• Tired old horse
• The horse to annoy continually
• Henpeck like old horse
• Annoy the old horse persistently