It will depend on what style your spandex shorts are for this, so it can go two ways.
If your spandex shorts have a diamond shaped crotch to them, take one pair that is older and remove the diamond shape inside the stitching, so you now have a pair that has your pussy exposed. Wear that under a skirt and go out in public.
If the spandex shorts do not have a crotch area that is mean to prevent camel toe, put a toy in your pussy, such as a small dildo, and then put shorts or a skirt over them and go out in public.
If you have yourself a partner, try having sex with a pair of spandex shorts on that have that crotch cut out. My wife says it can be intense, though it can frustrate her because she can't reach her clit. And that is part of the fun, making her work harder to cum.