(As the author of the first comment), I said friendly in the sens beginner-friendly. Where they are a tons of documentation (online and books) available, tons of libraries, tons of person actually using it, lots of job opportunities, easy to learn, etc.
I know some authors recommend learning lisp as a first language because there are not a lot of syntax and you can focus on the important problems. However, from my experience, my university colleague hated lisp and prolog, preferred C++ and really liked C# and Java. Lots of them were pretty beginners or bad programmers, but still, you can't start somewhere and be already an expert.
So, hope it clarified what I mean by Java being friendly. And then, Clojure might be less friendly than java.. but still, in this mentality, might be more friendly than scheme .