Seems have someone meet same problem with me:
https://emacs.stackexchange.com/questions/30857/clojure-code-evaluation-in-org-mode-produces-no-output
[stardiviner] GPG key ID: 47C32433
IRC(freeenode): stardiviner Twitter: @numbchild
Key fingerprint = 9BAA 92BC
```
#+BEGIN_SRC clojure :session
(def kk "stardiviner")
#+END_SRC
```
Press =[C-c C-c]= to evaluate this. Then check out =kk= in CIDER REPL
buffer.
That's why my problem happens:
https://emacs.stackexchange.com/questions/30849/how-to-generate-inline-plot-result-for-ob-clojure