Related Clues:

• Muddy walk
• Toil
• Marsh march
• Tedious task
• Put one's nose to the grindstone
• March through mud
• Walk tiredly
• Wade through mud, e.g.
• Plod
• Walk wearily
• Walk with difficulty
• ''. . . ___ and trouble'' (''Macbeth'')
• Long march
• Trouble partner, in Shakespeare
• Pains