This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 迠 is uncertain. It combines 辶 (movement) with 占, but the original meaning and component relationship are unclear.
The movement radical 辶 wraps around 占, but without a clear meaning, picture a mysterious traveler whose destination is unknown.
For ショウ, imagine the traveler moving slowly, making a soft 'sho' sound with each step: sho -> ショウ.