Related Clues:

• One of Churchill's four offerings
• Plod heavily
• Exhausting effort
• Plod through mud
• It's no fun at all
• Labor strenuously
• It might make you a sweater?
• Go, as through mud
• Really work
• Trouble's partner, in Shakespeare
• Trudge through mud
• Hoe and weed, e.g.
• Hard labour
• Work hard, labour
• Work hard and long