This is what Rippetoe himself told me:
Originally Posted by RichMahogany
Right now I'm just doing deadlifts but if it turns out they are just too much to do them every time, I will start swapping out other things. In addition to the SS stuff I add a few other things anyway in my attempt to one day be able to do a pullup. So eventually maybe I can do the version of his program that has chins and pullups.
The power clean is used to help athletes convert strength to power, which is the explosive display of strength. This is explained in the book. Not everybody needs to do power cleans, especially if doing them poses a greater threat of injury that the benefits that could be obtained. You're probably in this category. Just get your deadlift up to 200 and worry about cleans then.
It sucks when you are so far below the starting place that even a program called Starting Strength is too far advanced.
Female, 5'3", 50, Starting weight: 163lbs. Current weight: 135 (more or less).
I can squat 187.5lbs, press 75lbs and deadlift 200lbs