fixer

noun

1. (agent, form-of)Agent noun of fix: one who, or that which, fixes.
2. A chemical (sodium thiosulfate) used in photographic development that fixes the image in place, preventing further chemical reactions.
3. A person who serves as an agent to arrange for a desired result, perhaps by improper and/or unlawful means.
4. (Philippines, broadly)Someone who is often paid that helps a customer cut through red tape, especially for government processes or applications.
5. A person who arranges immunity for defendants by tampering with the justice system via bribery or extortion, especially as a business endeavor for profit.
6. A person who assists foreign journalists in volatile countries, often providing interpretation, personal connections, and transportation services.

   “Yet at the same time, this is also the source of what journalists see as one of the major risks involved in dependence on the fixer: the fixer may determine, to some extent, what the journalist sees. It is at this point that differences between journalists become apparent in the interviews – they give different evaluations of the risks. Clearly, this is a point of tension in their understanding of the situation: the prime positive qualities of the fixer are also the potentially negative ones.”

7. (US)A fixer-upper.
8. (slang)A drug dealer or user.

   “He'd say things like, “Now, I don’t want you in Harlem!” He was afraid I'd meet the wrong people in Harlem; fixers, junkies, people like that.”