Related Clues:

• Restaurant bill
• Common element of 20- and 56-Across and 10- and 27-Down
• Cash alternative
• Look into
• ''Understood''
• King pin?
• '10-4!'
• Inspect
• After-dinner request
• Request to a waiter
• Take a quick look
• 'Roger that'
• Danger for a king
• Potential mate
• Refrain or verify