fixer

Definition
(noun) someone who intervenes with authorities for a person in trouble (usually using underhand or illegal methods for a fee) Definition
(noun) a chemical compound that sets or fixes something (as a dye or a photographic image) Definition
(noun) a skilled worker who mends or repairs things Definition
(noun) synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction