Related Clues:

• Song starter
• The tops
• Steak sauce brand
• First song on a jukebox
• "Excellent!"
• Emcee's remarks
• "101" class, briefly
• "Heeeeere's Johnny!" is one
• Excellent (Sl.)
• Best-of-the-best
• First-class, so to speak
• Good rating, for steak?
• Opening music
• Emcee's line
• "In this corner ..." begins one, briefly