Related Clues:

• Unlike pro bono work
• Settled bill
• Forked out for dirt cheap sides sent back
• Given a check
• Stamp on an invoice
• Owing nothing else on
• Relief after penny spent
• The P in PTO
• Covered the tab
• Document stamp abbr
• Treated at a restaurant
• In-basket stamp
• Accounting dept. stamp
• Was worthwhile, with 'off'
• Covered the bill