Related Clues:

• Convert a message
• Put into cipher
• Crate eggs, e.g.
• Make unreadable
• Secure, in a way
• Write in Playfair, e.g.
• Pack in a box
• Coat with plastic, e.g.
• What cryptographers do
• Do a travel clinician's job, say
• Make secret, in a way
• Keep from being handled, as a relic
• Protect, as a museum exhibit
• Encipher
• Put in a crate