This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 黱 is uncertain. It visually contains 黑 (black) inside a structure that may be related to 朕, but the origin is unclear.
With 黑 (black) inside, 黱 might suggest something dark or ink-related, but its meaning is not clear enough for a reliable mnemonic.
For タイ, imagine a dark tie (タイ) dyed with black ink: tie -> タイ, and the blackness inside 黱 reminds you of the reading.