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Install clojure-mode either from git or via Marmalade using Emacs' package manager.

Open or create a Clojure .clj file, and you should find that clojure-mode enabled since built-in functions and forms are syntax-highlighted.

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  • SLIME and Swank Clojure: a rich, complex mode that provides various commands to communicate with an external Clojure instance via a socket.
  • inferior-lisp: a simple mode that will start a Clojure instance as a subprocess and then communicates with its REPL via stdin/stdout pipes.

In both cases, you need to launch a Clojure subprocess. This is most commonly done using a tool such as Leiningen.

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