I'm going through the same thing now. I replaced the clip and it didnt help. The plastic where the cable connects is broken and the cable has about 1/2 inch of free play. just enough to cock the window as it goes up and bind it against the door handle. You do not need a motor. You may be able to get that little plastic clip that snaps onto the regulator cable but i just went ahead and ordered a regulator.
Good luck