This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
傊 visually combines 亻 (person) and 員, but the exact historical development is uncertain. It may be a phono-semantic compound, but the original meaning is unclear.
A person 亻 beside 員 might suggest a person associated with an official or member, but the meaning is too uncertain to build a reliable mnemonic.
For イン, imagine a person 亻 inside an inn イン: the inn reading cues イン, though the kanji's meaning remains unclear.