This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
迾 combines the movement radical 辶 with 列, which likely contributes a phonetic element. The exact historical development is uncertain.
The movement radical 辶 wraps around 列 (line, row). Picture a line of people moving, but the meaning is unclear.
For レツ, imagine a line (列, れつ) of people moving along a path: 列 -> レツ, and the movement radical 辶 reinforces the idea of moving in a line.