sounds like possible problem with clutch slave cylinder. to bleed master, put in vice, hold it by one of the bolt hole spots. they make little plugs that thread into holes where lines come in, with hoses going back into resevior, or just plug the line holes with your fingers, and slowly push the piston in with blunt object, or screwdriver. while resevior is mostly full. fluid will be forced out the lines, it will be a little messy. don't stop untill bubbles stop coming into resevior. you might not have to do it, but just something to think about. if you replace slave cylinder, bleed it just like you would brake calipers.