Hi Noah,

from master, you can now use a :sort parameter in clocktable
to sort a column.  For example:

#+BEGIN: clocktable :maxlevel 2 :scope file :sort (2 . ?t)
#+CAPTION: Clock summary at [2014-04-16 mer. 18:12]
| Headline     |   Time |
|--------------+--------|
| *Total time* | *0:34* |
|--------------+--------|
| STRT abc     |   0:15 |
| STRT def     |   0:19 |
#+END:

The (2 . ?t) means: "sort the second column by time."

Let me know if it works for you,

--
 Bastien