This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
娗 combines 女 (woman) with 廷, which likely contributes the sound. The exact historical development and original meaning are uncertain.
A woman 女 beside 廷, a shape associated with court or straightness. Without a clear meaning, picture a graceful woman standing tall and elegant in a court setting, matching the kun-reading gloss of being slender and beautiful.
For テイ, imagine a graceful woman taking tea at court: tea -> テイ, and her elegant posture matches the kanji's slender beauty.