Related Clues:

• Postage piece
• Notary's implement
• One stuck in a corner?
• Bit of postage
• Rubber-__ (approve unquestioningly)
• Passport Control device
• Corner square?
• Part of a philatelist's collection
• One might be forever
• Sticker on an envelope
• It may say 'Forever'
• Notebook's spine, perhaps
• Source of chef's cooking fat causing wind
• Bedspring's shape
• 'Forever' postal purchase