From Longman Dictionary of Contemporary Englishfixerfix‧er /ˈfɪksə $ -ər/ noun [countable] ARRANGE A MEETING, EVENT ETCsomeone who is good at arranging things and solving problems for other people, sometimes by using dishonest methods a political fixer
Examples from the Corpus
fixer• We like to see ourselves as born mavericks and fixers.• He was no more illegal than most of the fixers in this business.• I suspect your fixer is a crook. 