Clutch on 2001 Nissan Xterra

Im having problems with the hydralic clutch master cylinder
I have replaced lower clutch ass that seemed to leaking fluid. know the fluid is leaking at the clutch cylinder on fire wall what is the fix possible in the lower lune ass or the master cylinder

Asked by for the 2001 Nissan Xterra
If the Clutch Master Cylinder is leaking, well that can not be good. When I replace a clutch slave cylinder I always replace the master with it as a set, kind of like buying a pair of shoes vs 1 shoe.