Possible Clues:

• One wouldn't believe the extent of her foresight
• 'Troilus and Cressida' role
• Person who prophesies disaster, after Greek legend (9)
• This might have foretold that the fool and the artist would follow the century
• Prophet's version of George Eliot's thieving villain (and artist
• Trojan War prophetess
• One who phrophesies disaster, named after ancient Greek woman
• Accountant's lady, one having gloomy views
• Accountant's girl - whose predictions nobody believed?
• Prophet not listened to