Eliminator

From Memory Alpha, the free Star Trek reference.

An eliminator was a professional assassin in the Ferengi Alliance.

During the 2370s, Leck was an eliminator. Many (or most) Ferengi view Eliminators as dangerous psychopaths, who appear to enjoy killing (thus eliminating potential customers, highly discouraged in Ferengi society) as much as or more than the profits derived thereby. (DS9: "The Magnificent Ferengi")