You bleed the clutch through the slave cly. Bleed the clutch the same way as you would bleed the brakes. If you bleed the clutch and the pedal comes back to normal, then there is a sign of faulty master cly or slave cly. Hard to tell which one it is. I always replaced both at the same time, or take a 50/50 shot at it.
Air and a worn clutch disk will release at high pedal position. Usually when the clutch disk is going, it starts to slip.
There is an adjustment behind the clutch pedal with a 12mm bolt. You can adjust the engagement of the clutch. I have seen some cases, where over a
period of time the nut works loose and the point of engagement of the pedal changes.