Org. for Nelly Korda and Lydia Ko

LPGA

This pro golf tour features top women players competing in major championships worldwide.

This clue refers to the LPGA, the Ladies Professional Golf Association, which is the main organization for women’s professional golf. Nelly Korda and Lydia Ko are both top-ranked golfers who compete on the LPGA Tour, making the answer a straightforward abbreviation for the group they belong to. The clue uses "Org." as shorthand for "organization," a common crossword convention.