Well, If you had bone surgery (Shaving and debris removal) your biggest problem will be range of motion. Muscle tissue, once built, can be rebuilt through work. Now, another stumbling block could be the amount of pressure that can be put on your collar bone. I seem to experience some mild discomfort there doing Decline Bench Press and Shoulder press. Only you can decide what is too much.
As far as workouts that will strengthen that region, that's pretty simple.
Upright rows strengthen the traps
shrugs for the traps
Shoulders can be done with behind the head presses and dumbbell presses
lateral raises can be done as your third.
Barbell and dumbbell front raises will complete the muscle group. (Three heads)
If you're having trouble with range of motion, try yoga.
I'm not Adonis, but I hope that helps.