ˈ ̷ ̷| ̷ ̷ ̷ ̷ noun
Etymology: ring (I) (group) + leader
: a leader of a group of individuals engaged especially in violation of law or an improper enterprise
one of the ringleaders of the abortive revolution — Ethel Drus
vengeful murder of the mutiny's bloodthirsty ringleader — F.R.Dulles