This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
饆 combines the food radical 飠 with 畢, which likely contributes sound. The exact historical development is uncertain.
The food radical 飠 suggests something related to eating, but the overall meaning is unclear.
For ヒツ, imagine a rare food dish that hits the spot: hits -> ヒツ, though the kanji itself is obscure.