fixer

(noun) someone who intervenes with authorities for a person in trouble (usually using underhand or illegal methods for a fee). Synonyms: influence peddler.

(noun) a chemical compound that sets or fixes something (as a dye or a photographic image). Synonyms: fixing agent.

(noun) a skilled worker who mends or repairs things. Synonyms: mender, repairer.

(noun) synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction. Synonyms: methadone, methadone hydrochloride, methadon, dolophine hydrochloride, synthetic heroin.