Interesting situation. I suggest you search the forum to see if anyone has dealt with this problem before, and beyond that I think it might be good to post this in Rip's Q&A.
I don't see that power cleans are very important for someone in your position, so don't feel like you absolutely must find a way to do them. As for the rest, the general rule around here is to start light and progress slowly with good form as long as you feel you're not hurting yourself.
Edited to add: As I read your post more carefully, it sounds like you used to lift weights regularly but then stopped as you became more serious about running. You would have detrained (lost strength) considerably in that time, and then you had a stress fracture.
Strength training makes your muscles and bones stronger, so you should think about devoting a little more attention to strength training even once you return to running. Something to think about.