Related Clues:

• Sixth of 24
• Sixth in a series
• It sounds last, but it's sixth
• Last name in cinema, ___-Jones
• Greek sleeper's letter?
• Catherine -- -Jones'
• Catherine -- -Jones
• Greek "Z"
• Actress Catherine ___ Jones
• Letter on a sweater
• Riemann ___ function
• Zed and, in Latin, a Greek letter
• Letter before 19-Across
• Where Greek character may be 14
• Greek letter (for Catherine Jones?)