This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
捔 combines 扌 (hand) with 角 (horn). The exact historical development is uncertain, but it likely relates to a hand action involving a horn or angular object.
A hand 扌 holding a horn 角 suggests an action, but the specific meaning is unclear. Imagine using a horn as a tool or weapon.
For カク, picture a hand grabbing a horn and making a sharp 'kaku' sound as it snaps: kaku -> カク.