RDLS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!head looking up at God.
sorry to say but power cleans will not cause hypertrophy in traps. unless you are doing hundreds of them a week for years and years.
rdls,upright ows, shoulder press, will kill your traps to hold lockout overhead after they are pre exhausted.(dumbell) then heavy mofo shrugs(try 20 reppers)