Possible Clues:

• Someone untied by a contract
• He's not bound to release a spy
• Someone whose actions are not constrained by others
• Athlete who's not contractually bound to a team
• Frank's a toff, being his own boss
• Loud rampaging teenager, one without restraint
• Unrestricted actor
• One without a contract, perhaps
• One under no compulsion to release spy
• House broker who doesn't charge?