Related Clues:

• Pains
• "Bubble, bubble, __ and trouble ..."
• Lumber
• Work wearyingly
• It might make you a sweater
• Tread heavily
• ''Double, double ___ and trouble . . .''
• ''Macbeth'' witches' word
• Make slow progress
• Trouble partner
• Trudge (through)
• "Macbeth" witches' word
• Trudge tediously
• Walk laboriously
• Sweat producer