Related Clues:

• Fancy niche accommodating one with little faith in human nature
• Long-suffering type; follower of Zeno
• Eleatic philosopher
• Philosopher thus holding the office, initially
• Philosopher is a right TS Eliot, unfortunately
• Endless criticism written about old philosopher
• One thinking the worst
• Geometrician I'd clue in another way
• On top of cases, like this old question-master?
• Thinking Greek has come up to ring Child Line
• Hemlocked philosopher
• With love at heart, good person in charge of a classical school
• Republic author
• Philosopher resorts to iconoclasm in part
• Philosopher not quite 'in the zone'