Game concept
Pressed Claim
The game also links it as Pressed Claims, Pressed.
From the game's encyclopedia
Pressed Claims are considered legally strong, and are inherited as Unpressed Claims by the children of the Claimant.
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.
Pressed Claim is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Pressed Claims are considered legally strong, and are inherited as Unpressed Claims by the children of the Claimant." It is part of claim. The game also links it as Pressed Claims and Pressed. 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.