Possible Clues:

• The Burial at Thebes is Heaney's translation of Sophocle's (8)
• Girl with the daddy of all Oedipus complexes
• Greek heroine whose opponent vanished
• Opponent no longer with us - difficult daughter
• Unfortunately, no agent will accept a single Greek play
• Subject of a Sophocles tragedy
• Not 'Enigma Variations'? No, Monsieur, it's a tragedy
• Opponent disappeared? What a tragedy
• Worker and I left, with Jocasta's daughter
• Daughter of Oedipus and Jocasta in Greek mythology