Possible Clues:

• French official with authority over the lower classes?
• Couldn't be better
• Roman magistrate; school pupil
• Chief officer flawless? Twisted inside
• Senior pupil with powers
• Schoolchild given authority over others
• Advertising flaw initially exposed powerful figure in school
• Head boy would be ideal if second and third changed places
• Setter drops in, keeping judge from monitor
• After first period, consider expelling student — bossy one