Possible Clues:

• Revolutionary took time as a trainee fighter
• Trainee acted irregularly
• Trainee Tom from in France entered
• Officer-in-training
• Enrollee at 56-Across
• Panic a detective arresting soldier in training
• Rebel sergeant finally becomes aspiring officer
• Young trainee, eg in the police
• Younger member of family Edward and Bill brought up
• Rebel's time as potential officer