You have an air bubble trapped in the master cylinder.
Have someone rapidly pump the clutch pedal 6-8 times , holding the pedal all the way down on the last stroke.
Crack open the bleeder screw
Slowly let off the pedal.
Wait a couple seconds.
Repeat 2 more times.
Top off master cyl. reservoir with fresh fluid.
Repeat sequence 2 more times.
Other option is to remove the master cylinder enough to angle the pushrod end down , this forces the air toward the outlet end , but is more difficult due to lack of room.