Clutch

The slave cylinder is on the side ot h engine by the clutch. If you follow the clutch cylinder line down it is connected to it. There will be a little screwtype thing that bleeds the system after you loosen it. I would suggest getting someone who knows how to do this if you are unfamiliar with cars or don't want to take it to a garage. These normally have to be pressure bled and it either takes a power bleeder or two people to do it. There cold be an underlying problem as to why this has happened as you usually just don't get air int he system.