Possible Clues:

• Army servant
• Fly-by-night was associated with 9 across and looks after one on campaign trail perhaps
• Billionaire playboy Bruce Wayne...or is he?
• Soldier attending major film
• Serve bantam to one of those looking out for someone on campaign trail perhaps
• Comic hero and outlaw pinching cash machine
• 2016 movie opponent of Superman
• Foe of Poison Ivy
• When one take things off you get this on in school