Related Clues:

• It may bark
• Close securely
• Letter closer
• Notary's need
• Antarctica dweller
• Singer who married Heidi Klum
• A Navy commando
• Fasten securely
• One having a ball at the circus?
• It might be presidential
• Mammal with flippers
• Shut tight
• One-named "Crazy" singer
• Animal with a pup
• Walrus's cousin