Related Clues:

• Coca-Cola brand
• Paper in a pot
• Note
• Gambler's I.O.U.
• Chit in a pot
• It might be run at a bar
• Coca-Cola Co. brand
• Marker letters
• Debtor's letters
• Can opener
• Slot filler
• Letters of credit?
• Keyboard key
• Marker, briefly
• See 52-Across