Crossword Clue:

A person of great power or authority

AnswerCrossword Clue
LORDPerson of power and authority.
TITANPerson of great power.
MACHINEPerson with great power and stamina, as it were
DIADEMRoyal authority or power.
ENABLEDGave power or authority
TITANMan of great size or power.