This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
槅 combines 木 (tree/wood) with 鬲, but the exact historical development is uncertain.
The left side is 木 (tree/wood) and the right side is 鬲, a shape that resembles a cooking vessel. Without a clear meaning, picture a wooden stand or frame holding a pot.
For カク, imagine a wooden rack (カク) holding a 鬲-shaped pot: rack -> カク, and the wood 木 supports it.