Related Clues:

• First few bars
• Foreword, briefly
• 101 class, briefly
• Musical start, for short
• Speaker's lead-in
• Primary stratagem
• Many a freshman course
• Words about a speaker, briefly
• First lines
• First song on an album, perhaps
• Primary course
• Host's responsibility
• Low-level course
• 101 course, generally
• 'Ladies and gentlemen ...,' e.g.