Related Clues

• Grease pencil, for one
• Promissory note in a casino
• Gambler's I.O.U.
• See 62-Across
• Piece of bingo equipment
• Surveyor's stake, typically
• It may be magic
• IOU
• Felt-tip pen
• Sharpie product
• Whiteboard need
• Sharpie, for one
• Felt-tip pen with a broad tip
• Sharpie, e.g.
• Chit
• A watchful and bruising opponent?