Possible Clues:

• Here's the very person to speak about Satan
• Mention Nick ... here he comes!
• Here comes the subject of our conversation
• It's the junior barrister's address - and here he is!
• Diabolical conversation? And here's its subject!
• Discussion of Satanism required? Here's the very fellow!
• Comment on unexpected appearance of Nick's address?
• Old Nick's address - and here he is!