Related Clues:

• Be behind, perhaps
• Run up debt
• What a 54-Across may do to a matador
• ''Go get 'em!''
• 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
• Formally accuse
• Use a credit card
• Have chits