Related Clues:

• Walk doggedly
• Hard work or work hard
• Walk hard carrying logs?
• Work really hard
• Labour
• This will work if you lubricate the end of it
• Given some lubrication at last, this will work
• "Double, double ___ and trouble ..."
• "Bubble, bubble, ___ and trouble ..."
• Work up a sweat
• One among many getting up to work
• Labour's struggle
• Hit - hard work
• Hit hard - work hard
• Hard work — work hard