Thanks to Will37 and Xwordfan for your earlier replies.
Will, your posts 11 and 17 would explain the final paragraph.
I did find this an engrossing puzzle, in spite of a few flaws.
I made this much harder for myself by not reading the preamble properly. A recurrent problem for me. Despite the niggles discovered by others I thought this was cleverly put together. I still have some empties but they will fall into place.
40dn made me smile, as a young teenager I was smitten by Little Joe.
I enjoyed this puzzle, despite the forbidding acres of unclued lights ... but i could use a nudge on the second full word on the antepenultimate line, where I have *ide*.
Thanks in advance and Mrs Misty Archer to you all (5,9)
Gerba, that word is a real gift to setters. It's a small French...animal (to save overly generous thematic stuff). Its usual meaning is far more widely know...