Possible Clues:

• Gymnast Korbut
• First name in gymnastics
• 'Three Sisters' sister
• Olympian Korbut
• "Three Sisters" sister
• One of Chekhov's 'Three Sisters'
• One of Chekhov's "Three Sisters"
• One of Chekhov's Three Sisters
• Lingerie brand
• Korbut of gymnastics