Related Clues:

• Starting words
• Freshman course word
• It may begin with "Here's"
• Opening speech
• Keynote precursor
• Song starter
• Emcee's remarks
• "101" class, briefly
• "Heeeeere's Johnny!" is one
• Opening music
• Emcee's line
• "In this corner ..." begins one, briefly
• "And now," e.g.
• Emcee's words
• Talk show lead-ins