Related Clues:

• Worn-out horse
• Pain of a sort
• Pain in the rear
• Keep reminding
• Pester incessantly
• Mixed-up PETS?
• Horse put out to pasture, maybe
• Orkin victim
• Kibitzer, e.g.
• Gnat, for one
• Kid brother, stereotypically
• Carp at
• Unwelcome greenhouse guest
• Pester persistently
• Remind too much