This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
仯 combines 亻 (person) with 少 (few/little). The exact historical development is uncertain, and the character is rare in modern Japanese.
A person 亻 beside 少 (few/little) might suggest a small or insignificant person, but the meaning is unclear.
For ソウ, imagine a small person sewing a tiny garment: sew -> ソウ, tying the person and smallness together.