MIAMI — Winning has done wonders for Jordan Clarkson’s efficiency and defense. Coming off consecutive seasons of decline in those areas, there were questions about Clarkson’s trajectory as he joined the Knicks: Was he struggling because of his age (33), or was it the tanking environment in Utah? Through his first 12 games with the Knicks, Clarkson has demonstrated that all he needed was a little more motivation . “It’s a level of focus. I’m glad to be back in this and part of this and back