Game concept
Intrigue Skill
The game also links it as Intrigue.
From the game's encyclopedia
Intrigue is a Skill representing a Character's ability to understand and manipulate other characters, and to organize elaborate plots.
It is mainly used to further — and defend against — Intrigue Schemes.
The corresponding Lifestyle is the Intrigue Lifestyle.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Intrigue Skill is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Intrigue is a Skill representing a Character's ability to understand and manipulate other characters, and to organize elaborate plots." It is part of Skills. The game also links it as Intrigue. Patch 1.20.1.2, from game/common/game_concepts/00_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/00_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.