Push mower moved out within precipitation, clutch rusted, single squeals after a minute, next shuts down. Now what??
Answers: Clutch? On a push mower? Most likely it's the flywheel lying on the engine under the shroud to be precise rusted. Remove the shroud and you'll see the ignition coil. It's almost touching the flywheel and should have two "prongs" on it. Check them for rust and, if needed, slide some fine sand quality newspaper back and forth between the flywheel and the coil, beside the grit towards the coil. If that doesn't do the trick, call a mower repair shop, but be in position, because it could cost close to 100.00 just to integer out what's wrong, and most people would newly buy a new mower at that point, depending on what brand it is.
clutch rusted? Then replace the clutch or draw from a new mower.