Possible Clues:

• Castle with lots of steps
• Scientist Joliot-Curie or singer Cara
• 1973 Broadway revival starring Debbie Reynolds
• Leader of the girl group Red Velvet
• 1935 Nobelist Joliot-Curie
• Dunne of film
• Nobel winner Joliot-Curie
• Female name
• Sherlock's infatuation
• One-named K-pop singer