nice metal clothes pins
My mental alarm is going off, but maybe unnecessarily. Please make sure they’re sealed and regularly check that there are no chips in the coating, because any iron in them is going to rust when regularly exposed to brief periods of moisture and leave stains on your laundry. If they’re coated in aluminum, they should be fine. If they’re entirely aluminum, I’d worry about their strength for things like duvets, but for regular clothing and linens in mild wind, they should be fine.
If you want to have one and you’re looking for a project, this is doable.
You could try to saw off the part of the pole bottom that’s above ground, then see if the core of the pole was also filled with concrete.
If not, just get a pole with a narrow enough diameter to fit in the hollow.
If so, you can coat the embedded portion in a rust accelerator (you can get ostensibly nontoxic commercial ones, but you can also use brine, hydrogen peroxide, or a strong white vinegar solution- just make sure to avoid getting any of those near plant life you want to keep) every night for a week or two, irrigating it (again, watching out for plants or portions of earth that might be exposed to runoff- to be entirely honest, I’d probably use my waterpik for some pressure without much volume of water and line the block with rags to avoid soil contamination, but that’s probably just because I have a waterpik) and scrubbing the exposed edge with a wire brush every morning. Once enough of the old pole is worn away, you can fit a new one in the hole.
This all seems like a lot of work, but so does manually digging up a concrete block, lol