What about :results code
The default is a elisp code block so you get syntax coloring

That works fore lisp:

#+begin_src elisp :results code

(list 1 2 (+ 1 2))

#+end_src

#+RESULTS:

#+begin_src elisp

(1 2 3)

#+end_src

But with Clojure I get

#+begin_src clojure :results code

(list 1 2 (+ 1 2))

#+end_src

#+RESULTS:

#+begin_src clojure

nil

#+end_src