This is from the wonderful Nedor-a-Day
site, with a new public domain comic book story from Nedor comics every day, as the title suggests:
Seems like there are a lot of good possibilities from the pictures here. The site as a whole is full of good stuff too. I'm repurposing "Jill Trent, Science Sleuth!" as a Golden Age reprint story in the TGC Jet Dream 1970 Annual, but there's a lot more. Quite a few stories with female protagonists, or female characters in relatively prominent supporting roles.
This superhero story
, for instance, has a heroine stripped down to her underwear for no particularly good reason....