I\'m using nrepl.el, Emacs 24.2. My S.O version is OS X Lion 10.7.5.
Running the command [M-x] nrepl after start a REPL session through lein (:~ $
While @Arthur is correct a much simpler solution to your problem would be to install the exec-path-from-shell Emacs extension. It will copy your shell PATH (and MANPATH) to Emacs automatically and fairly reliably. This means that the PATH would be correct no matter where you started Emacs from (spotlight included).