Related Clues:

• Sanction wrongdoing
• Help in holding up
• Watch for the cops, maybe
• Deter's opposite
• Root for
• Drive the getaway car, perhaps
• Support when one shouldn't
• Be a lookout for, say
• Aid, in a way
• Assist in shenanigans
• Connive with a criminal
• Aid
• Second in crime
• Encourage, in a way
• Act as a shill for, e.g.