This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
枎 combines 木 (tree) with 夫, which likely contributes a phonetic element. The exact historical development is uncertain.
With 木 (tree) and 夫 (man), imagine a man tending a tree, but the tree's purpose remains a mystery.
For フ, picture a man (夫) blowing a flute (フ) under the tree (木): the flute sound cues フ.