Guy has a container for trash and a pole for picking up trash. So he literally cleaned up the town.

Also a reference to “Man with No Name” a cowboy movie.

It’s a play on the classic spaghetti western trope of a mysterious/dangerous drifter coming into town and turning out to be it’s unlikely hero who saves it from whatever ills it. You see it in classic samurai films too as a wandering ronin as the two genres are surprisingly intertwined.