___ Tour

PGA

This major golf championship series is named after its organizing professional association.

This clue is looking for a well-known abbreviation tied to professional golf. "___ Tour" hints at a major golf organization, and "PGA" fits perfectly as it stands for the Professional Golfers' Association, which runs one of the biggest golf tours in the world. The blank suggests a short, recognizable term, and "PGA" is the standard shorthand fans and players use.