This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 飰 is uncertain. It combines the food radical 飠 with 卞, but the original role of 卞 is unclear.
The left side 飠 suggests food, but the right side 卞 gives no clear clue. Without a known meaning, picture a mysterious dish on a table: its name and purpose are unknown.
For ハン, imagine a half-eaten mysterious meal: half -> ハン, tying the unknown food to the reading.