Related Clues:

• Drudge
• Work hard
• Toil (away)
• Spartacus, e.g.
• Ben-Hur, for one
• Serf
• Verdi's Aïda, e.g.
• Slog
• Work like a dog
• Androcles, e.g.
• One in bondage
• Work too hard
• Aida was one
• Master's minion
• Unpaid worker