Couldn’t find an appropriate picture of Delia, so you’ll just have to do without. But who is the returnee? We may never know.
Solution and explanations are in the following post. Scroll down for a browser-solvable version. You will get a confirmation message if you have fully filled in the grid correctly. Or download and print off the standard or inksaver png versions. Let me know if you had a crack at it, or tell me your favourite clue(s?!) in the comments here, or on Mastodon.