Related Clues:

• Shrew
• Orkin target
• Pester
• Termagant
• 43-Down, e.g.
• Torment
• Bettor's interest
• Back seat driver, e.g.
• Complain, complain
• Vexation
• Remind too often
• Pick on
• Over-the-hill mount
• Dennis, to Mr. Wilson
• Equine loser