noun, noun or participle which takes 'suru'
behind-the-scenes maneuvering; secret maneuvers
Refers to covert political or organizational maneuvering, often with a negative connotation of underhandedness. A yojijukugo used as a noun or with する.
彼は党内で暗中飛躍を繰り返している。
He is repeatedly engaging in behind-the-scenes maneuvering within the party.
その人事は、裏方の暗中飛躍によって決まったらしい。
That personnel decision seems to have been made through secret maneuvers by people behind the scenes.