Possible Clues:

• Intellectual with power over Switzerland
• Theologian perhaps affected by the sun when going outside church
• 'The -- -Gipsy', a poem by Matthew Arnold
• Gripping chapter, coming from our star pupil!
• Erudite individual
• 15-Across frequenter, maybe
• Description of panel admitting child as pupil
• Student’s mark cut by incomplete grasp
• One studying cold and hot parts of the sun
• Student involved in chorals