To me "clutch" and "elite" are the same thing.
If you can be depended on to make the plays that win games and you consistently do then you're "elite."
That definition works for K, QB, WR, or any defensive player.
When you're put in the position to make a play than can win the game how often do you?
That decides who's "elite."
"He had no teeth, and he was slobbering all over himself. I'm thinking, 'You can have your money back, just get me out of here. Let me go be an accountant." I can't tell you how badly I wanted out of there."
Denver rookie QB John Elway, on Jack Lambert, after Lambert and the Steelers knocked Elway out of his first game as a pro (1983).