Related Clues:

• Unpleasant necessity
• Unwelcome obligation
• "We're treating"
• Onerous weight
• Duty that's a drag
• Weighty obligation
• Unpleasant burden
• Heavy duty
• Unpaid debt, e.g.
• Obligation (or where it might fall?)
• "Drinks are __"
• Unpleasant duty
• Where our burden is?
• Great burden
• Major burden