Possible Clues:

• Carson's Carnac, e.g.
• Teacher who is up to cover winter morning
• Religious teacher executed butterfly in front of one
• Progressed through stream with one teacher
• Teacher travelled by water to Italy
• Johnny Carson persona
• Someone with almost mystical insight initially
• Religious teacher crawled, perhaps, in front of one
• Guru's morning in Westminster?
• Hindu teacher moved across the Ganges perhaps before one