This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 髜 is uncertain. It visually combines 高 (tall, high) and 昇 (rise, ascend), but the original semantic and phonetic roles are unclear.
The left side 高 suggests height, and the right side 昇 suggests rising. Together they might evoke something tall or elevated, but the exact meaning is unclear.
For キョウ, imagine a tall (高) figure rising (昇) in Kyoto (キョウ): Kyoto -> キョウ, tying the reading to the visual components.