This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 僺 is uncertain. It visually combines 亻 (person) with 喿, but the original meaning and component function are unclear.
Since the meaning is uncertain, focus on the shape: a person 亻 beside the component 喿, which appears in several other kanji.
For ショウ, imagine a person 亻 showing (ショウ) the component 喿 to someone, even though the meaning is unclear: show -> ショウ.