Related Clues:

• Writer's development
• First few bars
• Foreword, briefly
• Underlying idea
• This puzzle has one
• 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
• This puzzle's is revealed at 61-Across
• First lines
• Parts of a bride's attire, for this puzzle
• First song on an album, perhaps