Related Clues:

• It may bark
• Close securely
• Letter closer
• Notary's need
• Antarctica dweller
• A "sea, air, land" team member
• Singer who married Heidi Klum
• A Navy commando
• Fasten securely
• Ornamental stamp
• One having a ball at the circus?
• It might be presidential
• Mammal with flippers
• Shut tight
• One-named "Crazy" singer