grasp with hand, pinch
揪 centers on grasping or pinching with the hand, typically to gather or hold something firmly.
揪 combines 扌 (hand) with 秋, which likely contributes the sound and may relate to gathering or pinching. The exact historical development is uncertain.
The hand radical 扌 beside 秋 (autumn) suggests a hand gathering or pinching autumn harvest items.
For シュウ, imagine a hand pinching a shoe: shoe -> シュウ, and the hand grasps it firmly.