honest broker
US /ˈɑnɪst ˈbroʊkər/
UK /ˈɑnɪst ˈbroʊkər/
1.
a neutral and impartial third party who facilitates negotiations or mediates disputes between other parties, without having a vested interest in the outcome
:
•
The diplomat acted as an honest broker in the peace talks.
•
For the negotiations to succeed, they needed an honest broker both sides could trust.