Possible Clues:

• Junky jalopy
• Pile (of scrap?)
• Feature of a messy room
• He gets Father back to make his pile
• Pile of poor quality about to be chucked
• Old car of little value with front falling off
• Front removed from inferior crate
• Ace is put in with it in stack
• Carbon discharged by worthless old car
• Compost collection