Clarence Darrow, Old Vic
Kevin Spacey is seen before he is heard in Clarence Darrow, the solo play that is doing a brief if ferociously bracing run at the Old Vic, but once the actor stops fiddling with his onstage desk and starts to talk, well, watch out. A master ironist who can often stand at an intriguingly cool distance from the parts he plays, Spacey hasn't sounded this impassioned in years, and when the standing ovation arrives nearly…