Possible Clues:

• "If I Were a Rich Man" singer
• "Fiddler on the Roof" dairyman
• Milkman of musical fame
• 'Fiddler on the Roof' role
• 'If I Were a Rich Man' singer
• "Tradition" singer
• Zero Mostel’s “Fiddler” role
• 'Fiddler on the Roof' milkman
• ''If I Were a Rich Man'' singer
• "Fiddler on the Roof" protagonist