authority; big-shot; star
彼は経済学の巨擘として名を馳せた。
He became renowned as a giant in economics.
文壇の巨擘が後進の育成に尽力した。
The literary giant devoted himself to nurturing the next generation.
医学界の巨擘に師事して技術を磨いた。
He honed his skills under the tutelage of a medical authority.