Well, you gotta push it in and remove the c-clip, otherwise nothing will come out. I assume the center pin has been removed? If so, then my guess is the bearing has seized to the shaft as that's the only thing that would hold it in...unless the splines are seized.
At this point, you have nothing to lose right?? I'd do 10-pound sledge on the hub of the axle. I'd consider the axle shaft junk as well. You might have to sacrifice it to save the entire axle.