Related Clues:

• Exporting unit
• Boatload
• See 18-Across
• Shipload
• See 15-Down
• Nautical weight
• Cargo weight unit, perhaps
• Haulage unit
• Common truck capacity
• Brick measure
• A couple thousand pounds
• Won's follower?
• 512,000 drams
• Cargo measure
• It may be long or short