This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
獦 combines the animal radical 犭 with 葛, but the exact historical development and original meaning are uncertain.
The animal radical 犭 suggests a beast, and the right side 葛 is a plant name. Picture a wolf hiding in the kudzu vines: 獦 might be a wolf.
For カツ, imagine a wolf cutting through the vines: cut -> カツ, and the wolf 獦 slashes its way out.