Related Clues:

• Conclusion's opposite, briefly
• "SNL" host's monologue, e.g.
• Starter
• DJ's concern
• First few bars
• Foreword, briefly
• 101 class, briefly
• Musical start, for short
• Speaker's lead-in
• Many a freshman course
• Words about a speaker, briefly
• Introduction to a book
• First lines
• First song on an album, perhaps
• Host's responsibility