Clutch problem.

Hey fellas, my clutch has recently developed an unusual problem. It's kinda hard to explain but here goes. When I push it in and out it grabs then lets go . If I push it in and try to let it out smoothly it comes out a little at a time. its really annoying to drive especially with heaps of stopping and starting. Ive checked the clutch fluid its fine and there are no leaks. Any ideas what it could be?. Cheers.