Possible Clues:

• A plot (anag) (known to Aristotle?)
• 'Apologia Socratis' author
• Drama not unknown to philosopher
• Place at Oxford makes one think about philosophy
• Jason ____, British Touring Car driver
• Nietzsche antagonist
• 'Allegory of the Cave' philosopher
• One-named philosopher
• Socrates's student
• Disciple of Socrates