This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
劽 combines 列 (arrange, line up) with 力 (power, strength). The exact historical development and original meaning are uncertain.
With 列 (line up) over 力 (power), imagine lining up strength to cut or divide something, but remember the meaning is unclear.
For レツ, use the reading of the top component 列 (レツ) as a direct cue: 列 -> レツ, and the whole kanji shares that sound.