Would that indicate blockage if it collapsed? If so, lift up the rear axle and put it on jackstands after a long drive to get it where you think is over temp. Maybe even take the tires off. Have someone look at the hose as you maintain 60 mph. Don’t do it too long as you won’t have any air coming through the radiator, matter of fact I wouldn’t try this till you have your fan clutch issues solved and do it carefully so your not riding a cruise Missile through the back wall of your garage.