Possible Clues:

• Construction industry employee, for instance, working beside motorway
• Person working with brick
• Occupying room as on-off lodger, might you say?
• Couple of relatives employed on site
• A jar with two close relatives?
• Person building union of two generations?
• Craftsman representing two generations
• Builder thus punching worker?
• Mum's working for a member of a secret society
• Concrete mixer?