Related Clues:

• Tough trips
• Walks laboriously
• Toils
• Difficult jobs
• Arduous journeys
• Grinds
• Works like a dog
• Difficult expeditions
• Odysseys
• Struggles (through)
• Moves through mud, e.g.
• Treks (through)
• Muddy marches
• Hard hikes
• Big hikes