Related Clues:

• Tough travels
• Grueling tasks
• Trudges through muck
• Plods (through)
• Arduous tasks
• Laborious tasks
• Trudges through mud
• Hard-to-achieve goals
• Arduous jobs
• Plods through the mud
• Tiring tasks
• Walks through muck
• Long, tiring jobs
• Trying tasks
• They're tough to get through