Related Clues:

• Loser's problem, perhaps
• Outstanding issues
• What markers may represent
• Arrears, e.g.
• Things that are 36 Down
• Figures in red
• I.O.U.'s
• Red ink items
• Monies owed
• Reasons for 33 Across
• Collector's items?
• Borrowers' burden
• Outstanding issues?
• They may come from using plastic
• Slips in pots