Answer: kingpin

AnswerCrossword Clue
KINGPIN

Top dog

KINGPIN

Leader

KINGPIN

Chief

KINGPIN
Big cheese
KINGPIN
Capo di tutti capi
KINGPINCartel chief
KINGPINMan at the top
KINGPINChief person in a group: Colloq.
KINGPINTop man.
KINGPIN55 + 62
KINGPINV.I.P.
KINGPINCartel leader
KINGPINMarlo Stanfield, e.g., on "The Wire"
KINGPINTop banana
KINGPINBowler's aim
KINGPINHigh muck-a-muck