A leading figure or stalwart — an influential and established person in an organization or field.
党内の重鎮が会見で方針を示した。
A party heavyweight outlined the policy at a press conference.
この学会の重鎮たちがパネル討論に参加した。
The leading figures of this academic society took part in the panel discussion.
地方経済を支える重鎮として知られている。
He is known as a key figure who supports the local economy.