What if she has never had one to begin with?
I don’t see how an SOS could function without a security clearance. They are constantly involved in security situations. Just think about Benghazi. You KNOW she had to have been all over secret info on that. And that’s just one example. In 2016, when her campaign was asked if she still had a security clearance, their reply was, “no comment”. That speaks volumes, IMHO.