Related Clues:

• Postage
• Stop up
• Album entry, perhaps
• Part of a dollar bill
• One seen playing with a beachball
• Barking beast
• Envelope item
• If it's canceled, it has been accepted
• Make leakproof
• Post office buy
• __ of approval
• One of a Navy elite
• Performer with a balancing act
• Mark of approval
• Stamped symbol