This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
姴 combines 列 (arrange, line up) with 女 (woman), but the exact historical development and original meaning are uncertain.
The top component 列 suggests arrangement, and the bottom 女 is a woman. Without a clear meaning, picture a woman arranging something, but remember the meaning is uncertain.
For レツ, imagine a woman arranging a row of lettuce: lettuce -> レツ, and she lines them up neatly.