This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development is uncertain. The modern form visually contains 扌 (hand) and 麇, but the original component relationships are unclear.
The kanji has a hand radical 扌 beside a complex shape 麇. Without a clear meaning, picture a hand reaching into a dense thicket of deer and trees, grasping for something unknown.
For クン, imagine a mysterious figure named Kun reaching his hand into the thicket: Kun -> クン, and his hand searches for something hidden.