Related Clues:

• Piano-playing Dame
• Shell competitor
• Spandau's last prisoner
• Corporate giant based in Irving, Tex.
• Big name in oil
• Pianist Myra
• Big oil company
• Big name in petroleum
• Shell alternative
• Chevron competitor
• Infamous Rudolf
• Dame Myra
• Pianist Dame Myra
• Gulf rival
• Amerada ___ (petroleum giant)