On this car, the clip is very hard to access behind the trim washer on the
crank. I've never seen one of the special tools not butcher the washer.
If the hook method Brian describes doesn't work, you can try this (if the
crank will turn):
1. Get a reasonably sized flat-blade screwdriver-- something you'd
actually use to make screws tight-- small enough to fit a screw and large
enough to actually make something tight.
2. Turn the crank handle facing upward.
3. Insert the screwdriver between the crank handle and the trim washer on
the top side.
4. Pry back on the washer while turning the crank handle. This should
hold the washer still and push the clip off.