Related Clues:

• Musical start, for short
• Speaker's lead-in
• Many a freshman course
• Words about a speaker, briefly
• First lines
• First song on an album, perhaps
• Host's responsibility
• Low-level course
• 101 course, generally
• 'Ladies and gentlemen ...,' e.g.
• Proem or prelude
• Preliminary comment
• Words before the talk show guest enters
• Preliminary remarks (Abbr.)
• It could be four bars