You can take a long 3" screw of the same size as used in your hinges, put 2 in the top hinge, in to the door frame. if you need more, make a gage of the thickness that you want the margin to be, with a pensil mark a line around the doors edge where you want it to clear, all around if need be. take the door off its hinges and cut, you'll need a fine tooth blade, dont even think about using a hand saw =)
Oh and its out of plumb, not out of level.
williamh
October 2004