Related Clues:

• Treks (through)
• Eddies
• Muddy marches
• Works a double shift, e.g.
• Difficult journeys
• Galley group
• Works very hard
• Toils away
• Works in the mine, say
• Plugs away
• Arduous travels
• Tough jobs
• Hard, boring efforts
• Wades through the surf
• Does drudge work