Related Clues:

• Run-down equine
• Remind repeatedly
• Act shrewish
• Grousing spouse
• Back-seat driver, e.g.
• Worn-out horse
• Quibble (about)
• Keep reminding
• Pester incessantly
• Horse put out to pasture, maybe
• Be nitpicky
• Carp at
• Pester persistently
• Remind too much
• Subject of a tipster's tip