My answer is no!
If you are in a slip, than it's possible that you get in an a-symmetrical stall, one of your wings gets in the wake of the fuselage and stalls, the other wing keeps its lift and puts the plane on it's side. If the plane gets to it's side, the nose get's down, and so the other wing will comes out of the wake so there's no spin.
Maybe in specific ways the slip gets to a spin, but that should be very rare. I have a lot of experience in such things, and I never got in a spin when I was in a slip.
Badger,
f-16, Dutch airforce