Related Clues:

• 'To what do I ___ ...?'
• ''To what do I --- this ...''
• Must pay
• Run up an account
• Part of i.o.u.
• What borrowers do
• Have unpaid bills
• Have liabilities
• Postpone paying
• Be obligated to
• Really should give
• Uncle Sam poster word
• Verb in IOU
• Be shy, in poker
• Part of WYSIWYG