Possible Clues:

• Rodin's work is unconvincing to royals
• She uses her head
• Rodin sculpture (with "The")
• Generosity of sizeable security force envisaged in Britain by Deighton
• Scholar
• Worker who travels around hospital, one doing brain operations
• Person with a powerful mind
• One may be deep
• One ponders, having weak King with Queen
• Scholarly sort