Depends on the definition, doesn't it?
Too many players/coaches/parents celebrate style over substance. THAT kind of "flair" is fool's gold.
I think of "flair" more as a sixth sense, or vision, or "understanding." THAT kind of "flair" is keeping it amazingly simple, or finding just the right play.
As a Supreme Court justice once said of obscenity, and I paraphrase: Can't define it, but I know it when I see it.