Possible Clues:

• 'Can-Can' composer
• Composer of 79 Across
• Let's do it his way with notes
• Let's Do It songwriter
• One-time chancellor delivered drink to songwriter
• Composer has loads of energy, we hear
• Baggage handler turned songwriter?
• ''Wunderbar'' (1948)
• 'Anything Goes' composer
• "Can-Can" composer