Admittedly, I have never played golf. I am not saying that clutch doesn't exist in golf, just that what you guys are posting about it is anecdotal evidence. Your anecdotes do not mean that clutch does exist.
Are clutch golfers raising their game to a higher level than their usual performance in big pressure situations, or are they just always that good? Is it being clutch or is it being one of the best in the game?
As I posted about baseball, if you want to define clutch as the ability not to choke, then I can agree with that. If you want to define clutch as becoming a whole other player at a higher lever, than I'm not convinced.