This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 髹 is uncertain. It combines 髟 (hair) with 休, but the role of 休 is unclear.
The top 髟 suggests hair, and the bottom 休 suggests resting. Picture hair resting or being styled, but the exact meaning is unclear.
For キュウ, imagine a stylist giving a hair treatment while saying 'Q' (cue) for the perfect style: Q -> キュウ.