This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 嘼 is uncertain. It appears as a component in characters like 獸 (beast), but its independent origin is unclear.
The top 㽞 looks like a container, and the bottom 口 suggests a mouth. Picture a creature's mouth feeding from a trough, but the meaning is uncertain.
For キュウ, imagine a curious creature making a 'kyu' sound as it feeds: kyu -> キュウ, but the meaning remains unclear.