This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 脜 is uncertain. It visually contains the flesh component ⺼ and 自, but the original semantic or phonetic role of these components is unclear.
The left side ⺼ suggests flesh or body, and the right side 自 looks like a nose or self. Without a clear meaning, imagine a body part related to the nose, but treat this as a visual placeholder only.
For ジュ, imagine a rare jewel (ジュエル) embedded in the flesh: jewel -> ジュ, and the kanji's body component holds the jewel.