This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
傛 combines 亻 (person) with 容, which likely contributes the sound. The exact historical development is uncertain.
A person 亻 beside 容, a shape associated with appearance or form. Without a clear meaning, picture a person whose form is undefined.
For ヨウ, imagine a person 亻 with a 容 appearance saying 'yo!' as a greeting: yo -> ヨウ.