expel, drive away, beat, assault
敺 centers on forceful removal or attack: expelling someone, driving them away, or beating and assaulting them.
敺 combines 區 (a container or area) with 攴 (a hand holding a stick or striking), suggesting the idea of driving something out of an area by force. The exact historical development is uncertain, but the component combination fits the meanings of expelling and beating.
The left side 區 looks like a fenced-off area, and the right side 攴 is a hand with a stick. Imagine using a stick to drive someone out of an enclosed space: expelling and beating them away.
For ク, picture a cool (クール) guard using a stick to expel intruders from the area: cool -> ク, and the guard drives them away.