Related Clues:

• Moves clumsily
• Walks laboriously
• Works up a sweat
• Treads heavily
• Toils
• Receivers of manumission
• Difficult jobs
• Goes at a snail's pace
• Arduous journeys
• Breaks one's back, say
• Unskilled laborers
• Grinds
• Works like a dog
• Doesn't do the job easily
• Peon cousins