The slave cylinder sits on the front of bike behind the radiator. Before panicking about a replacement, remove your fairings and get it for a good look. You may need to get some degreaser to clean around the area, and hose the muck out. No need to pull the radiator.
Look around the banjo bolt (check that it is tight) where the clutch line connects to the slave cylinder, and the bleed screw(check it is tight also). Is there any sign of fluid leaking. open the bleed screw, and check for the colour of fluid coming out, ( get a bleed kit from an auto store if you dont have one) is there any sign of air bubbles.
If all is good here, unbolt and remove slave cylinder (not sure how hard this is to do) and check for fluid around the piston area. If there is, you will need to open up the slave cylinder to inspect the seals and bore. if the bore is good, you may be able to get a seal kit then put it all back together refill the fluid.
I'm not sure, but you may need to do an oil change as well, as I thing any leaking fluid may go into the sump, contaminating the oil.