What does the cryptic crossword clue "Divide into opposing groups pairs Leo organised (8)" mean?

The definition is "Divide". The wordplay uses an anagram. anagram of PAIRS + LEO = POLARISE; definition: "Divide" The answer is POLARISE.

Divide into opposing groups pairs Leo organised (8)

Daily Mail Cryptic #17443 | 29 Across | 2024-09-11 flower