Similar to doing brakes-
Put vehicle on jackstands
Remove dust cap on left side of clutch housing
push a length of clear tubing over the valve
place other end in clear container with about 2 inches of fluid in it.
have someone depress pedal & hold it.
Open valve until asst. signals pedal is at the bottom of it's travel.
Repeat until stream is solid with no air bubbles in it or container.
Note- keep an eye on reservoir .