Related Clues:

• Secure, in a way
• Shut tightly
• Business ID
• Letterhead design
• Aquarium performer
• Christmas or Easter fundraiser
• Mammal of approval?
• The Golden Arches, e.g.
• Close very tightly
• Flippered entertainer
• Organizational symbol
• See 5 Down
• Enclose tightly
• Christmas ___ (holiday stamp)
• Evidence of authenticity