Related Clues:

• Water mammal
• Bull or cow to make an impression
• Beneath ocean is large marine creature
• Document authenticator
• [Another arrangement of the letters in the grid]
• Zip, as a Ziploc
• Notary's imprint
• It signifies approval
• Marine mammal is close
• A selfish desire
• Cork coat of arms
• Big-top barker
• Approval indication
• Close tightly, as an envelope
• Pribilof Islands denizen