Possible Clues:

• Jack Nicklaus org.
• Pro golfer's org.
• Honda Classic org
• Org. with a summer championship
• Phil Mickelson's grp
• Driver's org., no matter how you slice it?
• Org. hidden in 'tulip garden'
• Babe Zaharias was the first woman to compete on its tour, in brief
• Org. for Bryson DeChambeau
• Org. concerned with traps and hazards