Related Clues:

• 101 class, briefly
• Musical start, for short
• Speaker's lead-in
• *First track on many a Broadway album
• Many a freshman course
• Words about a speaker, briefly
• Introduction to a book
• First lines
• Preparatory stage
• First song on an album, perhaps
• Medley that starts a musical
• Host's responsibility
• Low-level course
• 101 course, generally
• 'Ladies and gentlemen ...,' e.g.