This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 捒 is uncertain. It visually combines 扌 (hand) and 束 (bundle), but the original meaning and component function are unclear.
A hand 扌 beside a bundle 束 might suggest handling or tying something, but the actual meaning is unclear.
For ショウ, imagine a hand showing a bundle: show -> ショウ, though the meaning remains uncertain.