Related Clues:

• Maybe turn to Morse?
• Cipher, as a message
• Disguise, in a way
• Done with EC, potentially scramble message
• Make incomprehensible poem after being regularly crazy in the head
• Make cryptic once out of French
• Put into cypher
• Represent in cipher
• Change characters in French poem about Charlie
• Don't let the secret recipe get out for starter of Emerald Fish caught in northeast
• Build something that can be cracked, say?
• Act as a blueprint for, as DNA for proteins
• Along with the letter, poem put in secret text
• Make into a cipher
• Convert cryptographically