Related Clues:

• Envelope sticker
• Rattler's posture
• Sign of approval
• Notary's tool
• Impress
• Slinky's shape
• Postage
• Stamp purchase, perhaps
• Album entry, perhaps
• Wind (up)
• Envelope item
• If it's canceled, it has been accepted
• Post office buy
• Spring wind?
• Mark of approval