This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
钃 is a rare character combining 金 (metal) with 屬. The exact historical development is uncertain, but it likely relates to a metal tool or implement.
With 金 (metal) on the left and the complex 屬 on the right, 钃 looks like a heavy metal object. Its meaning is unclear, but the shape suggests something metallic.
For ショク, imagine a heavy metal shock when you see this rare kanji: shock -> ショク, and the metal component 金 reinforces the image.