Related Clues:

• Opening speech
• Keynote precursor
• Song starter
• Emcee's remarks
• "101" class, briefly
• "Heeeeere's Johnny!" is one
• Emcee's line
• "In this corner ..." begins one, briefly
• __ park
• Subject for discussion
• Emcee's words
• Essay's focus
• Musical opener
• Main melody
• This crossword has one