Possible Clues:

• Org. that recognizes the rarity of eagles?
• Drivers' grp.?
• Org. with members who have won green jackets
• Club club, for short
• Org. in golf or moviemaking
• Org. with expert putters
• Grp. whose members may shoot eagles
• Org. whose athletes try to be subpar
• Org. whose members may be fore-warned?
• Org. for athletes who putt