Possible Clues:

• Member of the Justice League
• Hero outlaw guarding cash machine
• Club servant becomes superhero
• Cartoon character
• Gotham superhero
• Robin's partner
• Officer's personal assistant in the armed forces
• Cricketer needing staff and personal servant
• 'British military orderly, with Robin as a sidekick? (6)'
• ''The Caped Crusader''