Related Clues:

• Short or long measure
• Unpaid debt, e.g.
• Obligation (or where it might fall?)
• "Drinks are __"
• Zoo weight unit
• 907.18 kilos
• Ginormous amount
• Unpleasant duty
• Where our burden is?
• Great burden
• A lot to lift
• "Long" or "short" weight
• Bricks unit
• Whole heap
• Major burden