I am the developer of HiveMind (crudzilla.com), it is a web app platform which supports Clojure...it does have a middleware which is language independent, meaning you can use Clojure for your logic and tap into the middle-ware for things like DB interaction, email and JSON based application configuration...etc

You can find a quick installation guide here: http://blog.crudzilla.com/2014/04/hivemind-on-digital-ocean-...

Here's a screencast showing usage of Clojure, it requires no additional setup besides the installation guide above: http://crudzilla.com/assets/img/info-graphics/lang-demo.gif