There are a lot of enticing questions that haunt “Tár,” Todd Field’s rapturously fascinating, dread-fueled, immersive drama about a symphony orchestra conductor, Lydia Tár (Cate Blanchett), who is living an above-the-clouds existence of art and fame and sensuality…until she isn’t. The movie, which feels like a documentary directed by Kubrick, is a kind of reality-based hifalutin humanistic tabloid puzzle thriller, one that deliberately withholds pieces of information, a tactic some viewers have a problem with, though I think it’s integral to the movie’s mind-game greatness. “Tár,” as driven by Cate Blanchett’s extraordinary performance, brings us right up close to Lydia:...