Related Clues:

• Be overly persistent
• Constantly find fault
• Old gray mare, e.g
• Bother, in a way
• Constant critic
• Kvetch constantly
• Unlikely derby winner
• Old mount
• Pester the old horse
• Keep from forgetting, perhaps
• Horse; keep scolding
• Complaint suffered by horse
• Keep criticising, hurting
• (Of pain) ache dully; horse (colloq.)
• Trouble for a horse