This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development is uncertain. The modern form visually contains 金 (metal) on the left and 欶 on the right, but the original semantic and phonetic roles are unclear.
With no clear meaning, focus on the shape: metal 金 beside the complex 欶. Imagine a mysterious metal artifact with an unknown purpose.
For シュウ, picture a shoe made of metal: shoe -> シュウ, and the metal shoe is as mysterious as the kanji itself.