Related Clues:

• Enclosure
• Enclose
• Certain newspaper ad
• Subscription card, e.g.
• Advertising extra
• Magazine ad, at times
• Newspaper extra
• Word over a slot
• Caret indication
• Add, in a way
• Advertising circular, e.g.
• Ad section
• Shim, e.g.
• Sunday paper extra
• Payphone word