This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
髬 combines 髟 (hair) with 丕, which likely contributes the sound. The exact historical development is uncertain.
The top component 髟 suggests hair, but the overall meaning is obscure. Picture a mysterious ancient hairstyle that no one can identify.
For ヒ, imagine a single strand of hair (髟) standing up like the letter 'H' (ヒ) on top of the head.