Possible Clues:

• ''Over There'' composer
• 'Over There' composer
• 'Yankee Doodle Dandy' songwriter
• 'Yankee Doodle Dandy' subject
• "Over There!" writer
• 'Over There' songwriter
• Cagney Oscar role
• ASCAP charter member
• 'Over There!' writer
• 'Yankee Doodle Dandy' man