This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
傱 combines the person radical 亻 with 從, which likely contributes sound and possibly a meaning related to following or accompanying. The exact historical development is uncertain.
A person 亻 beside 從 (which suggests following) could be imagined as someone hurrying along, but the meaning is unclear.
For ショウ, imagine a person 亻 following 從 a show: show -> ショウ, though the meaning is uncertain.