This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
襽 is a rare character combining 衤 (clothing) with 蘭 (orchid). The exact historical development is uncertain, but it likely relates to clothing or fabric associated with orchids.
The left side 衤 suggests clothing, and the right side 蘭 is an orchid. Imagine a robe decorated with orchid patterns, but remember that the actual meaning is unclear.
For ラン, picture a long orchid-patterned robe: long robe -> ラン, and the orchid 蘭 on the right reinforces the sound.
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