We internally have a nice component/widget abstraction we use which is not quite MVC, but we think cleans up a lot of web development. We will release in the near future once we perfect it.
I am just getting started with Clojure/CS and am evaluating the different options.
http://pedestal.io/ http://keminglabs.com/c2/ https://github.com/drcode/webfui http://ganelon.tomeklipski.com/