Possible Clues:

• Star's part
• Star part
• Rose Maxson in 'Fences,' e.g
• Top part in play for actor
• Bogart in "Casablanca," e.g.
• Part played by heavy metal star?
• Romeo or Juliet
• Biggest part
• Stanley Kowalski, e.g.
• *Rick Blaine in 17-Across, e.g.