honest broker n. phr. A person hired or appointed to act as an agent in a legal, business, or political situation where impartial advice is needed in order to settle a dispute. 
 Michael has been asked to act as an honest broker to settle the argument between the employees and the management.
 Michael has been asked to act as an honest broker to settle the argument between the employees and the management.  [TahlilGaran] English Idioms Dictionary ▲