Sound like the slave cylinder, which only runs you about $12.00 dollars at Oreily's auto parts, or any parts store for that matter.
I had the same problem and thought it was the master clutch cylinder and bought one for $70.00, but figured out it was not the problem but rather the salve cylinder, which I just now bought during lunch.

I have a leak at the slave cylinder, and it does not look that hard to replace either. Here is a link to the break down of the system.
http://www.hondaautomotiveparts.com/...ASTER+CYLINDER