Don't forget that with Clojure, anything you would do in Java or on the JVM using any language, you can do in Clojure. So for example, Scala has Akka, a powerful actor model. And of course, you can use that in Clojure if you want:
Interesting, okku seems completely outdated but I'll try to look out for an Akka integration as it is a really powerful and stable actor model implementation. Has backpressure and all of the other reactive niceties too.
You might just have converted me to clojure, haha.
I think most Clojure developers will tell you that it is wise at first to just use Java libraries directly, if you can. Look at wrapper libraries to see how the author approached the Java interop, then do it yourself. You are more likely to attain something that is maintainable, flexible and appropriate for your individual style and needs than using what someone else built for the purpose of interop for their needs.
https://github.com/gaverhae/okku
(This is just one way to use Akka).