Related Clues:

• Partner-in-crime
• Confederate
• Accomplice
• Aide
• Henchman, maybe
• Partner in crime
• Supplementary part
• Friend in crime
• Supplementary component
• Lookout, maybe
• Wingman, maybe
• One aiding in wrongdoing
• Kind of accomplice or clothes add-on
• Person who helps another commit a crime
• Hat or handbag, say