Related Clues:

• Checkout clerk's question
• Means of payment
• Redeem, with “in”
• Country singer Johnny
• Simple form of payment
• Some coins
• Root of all evil
• Bank contents
• ¢¢¢
• Method of payment
• 'I Walk the Line' singer
• Miser's fixation
• It's cold and hard
• It's exchanged every day
• 'Monopoly' supply