Related Clues:

• Campaign promise topic
• Dishwasherful
• Unpleasant burden
• Cigarettes have it
• Economists' subject
• April 15 payment
• Good thing to be sheltered from
• Heavy duty
• Unpaid debt, e.g.
• Whites or darks, say
• Obligation (or where it might fall?)
• "Drinks are __"
• It's your duty?
• Return subject
• Word on two "Monopoly" squares