- é|mi|nence grise
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1. a person who wields power or exerts influence behind the scenes: »
Krone sought the advice of the éminence grise of the chancellery, Globke (Atlantic).
2. (literally) gray eminence.╂[originally used in French as the nickname of Père Joseph, a monk who was Cardinal Richelieu's confidential agent, after the gray habit which he wore, in contrast to the Cardinal's red habit]
Useful english dictionary. 2012.