stretch those bad boys before squatting. im pretty inflexible in the wrist too, i make sure i stretch them alot before squatting and also before doing power cleans. dont want to risk minor tears or sprains.
you could also do the alternate grip to a clean grip. i think it was referred to as "cossack" style. just remember to keep that chest high and keep the bar in the groove in your delts.
front squats just hurt period unless you have a lot of padding (muscle) there or a towel on the bar. I either choke myself (bar rolls into my windpipe) or I just cant stand the pain WAY before I feel anything in my legs. My $.02 is to just stay basic until basic no longer stimulates growth. Even then, a variation of "basic" will keep you progressing...in other words, just squat!