Possible Clues:

• Turn 'this' into '_ .... .. ...,' e.g.
• Put (message) into ciphers
• Disguise one,s writing in enclosed poem
• Construct cryptograms
• Make cryptic request in theatre wanting one character replaced by daughter
• Cypher a direction without dictionary
• Write, as a secret message
• Points about business deals initially put in cipher
• In conclusion, company needs English cipher
• Hide, in a way