Possible Clues:

• Person who practises self-denial as a spiritual discipline
• Fan of austerity called out as an inflexible parasite
• Someone who eschews luxuries
• Self-denier like this Parisian having nervous reaction
• Practising self-denial
• One who lives a religious life of contemplation and self-denial
• Recluse beginning to appear agnostic is powerless
• Strict-living sect discovered imprisoned by revolutionary spies
• Many a monk
• Person who sounds vinegary