https://community.openstreetmap.org/t/amenity-clothes-dryer-to-man-made-clothes-line/134891/

https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dclothes_dryer

Note that value for this tag is highly confusing as in English "clothes dryer" refers rather to powered appliance that heats air to remove moisture[1]. It appears that "clothes line" would be less confusing value[2] 