Related Clues:

• Run up debt
• It can be singular or plural
• With 55-Across, Lionel Richie song
• Use a credit line
• ''To what do I ___ this ...''
• Get behind, in a way
• Be indebted
• Use 18-Across
• Have creditors
• Have to return
• Have an outstanding liability
• Have chits
• Second person?
• Run a tab, say
• 'Says --!'