All you need to get a minimal clojure development environment up and running on a brand new emacs (brew install emacs --cocoa)

init.el

(add-to-list 'load-path "~/.emacs.d/el-get/el-get")

(unless (require 'el-get nil 'noerror)
  (with-current-buffer
      (url-retrieve-synchronously
       "https://raw.github.com/dimitri/el-get/master/el-get-install.el")
    (let (el-get-master-branch)
      (goto-char (point-max))
      (eval-print-last-sexp))))

(setq init-packages '(el-get 
  	      clojure-mode 
		      midje-mode 
		      nrepl 
		      sr-speedbar
		      color-theme-railscasts))

(el-get 'sync init-packages)

(ido-mode 't)
(color-theme-railscasts)
(custom-set-variables
 '(speedbar-show-unknown-files t))