(~s)
If you refer to a man as the ~ of a group or profession, you mean that he is the oldest and most experienced and respected member of it. (FORMAL)
...the ~ of political interviewers.
N-COUNT: usu sing, usu the N of n approval
DOYEN
Meaning of DOYEN in English
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012