Related Clues:

• Help with the heist
• Aid in crime
• 'Not on ___!'
• Aid's partner
• Give relief to a thief
• Help a hoodlum
• Assist, in a way
• Advance the cause of
• Opposite of hinder
• Help in crime
• Help in a holdup
• Harbor, perhaps
• Help in hooliganism
• Act as an accessory
• Whistle at the sight of a cop, perhaps