I'm guessing what he means is that, because Clojure can work so well with Java, he doesn't have to find people with Clojure experience to help on a Clojure proj

I'm guessing what he means is that, because Clojure can work so well with Java, he doesn't have to find people with Clojure experience to help on a Clojure project, he can just get Java people (of which there is an abundance).