This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
錝 combines 金 (metal) with 宗, which likely contributes the sound. The exact historical development and original meaning are uncertain.
With 金 (metal) on the left and 宗 on the right, 錝 looks like a metal object related to a clan or sect, but its actual meaning is unclear.
For ソウ, imagine a metal bell that makes a 'sou' sound when struck: the bell is made of metal 金 and hangs in a temple 宗, and its tone 'sou' cues ソウ.
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