Stella @9 I think you’ve got your bloggers confused; Rightback hasn’t blogged a Saturday prize puzzle for some months now, but I have no doubt he would have polished this one off in under a quarter of an hour. As for INCORPORATED, I’m with scchua @12. Would it be fair to classify “vulgar parlance” as hackneyed in this case?

Martin H @19, Chambers offers this definition:” when (a certain time) comes (as in Come five o’clock, it will be dark outside)”, classifying it as a usage of the 3rd person singular, especially in the subjunctive. I accept however that the clue is defective, which may explain why it took me so long to parse it.

14d: I never like regional pronunciation ‘homophones’, and this was no exception – and if you do rub with sandpaper that makes you a rubber, not the sandpaper.

Otherwise this was most enjoyable: TOP UP, PBB, DRYAD, MOREOVER four among many excellent clues. I too had a brief go at ‘muffle’ (18d). I thought the parenthetical ‘music’ was odd here. ‘Loud’ is commonly used for ‘f’, but if A wanted to use ‘music’ for the surface, why put it in brackets?

1d: ‘copybook’ is by no stretch of lexical laissez-faire a true Spoonerism, which is no doubt why Araucaria gives us the surface ‘Perfect example of a Spoonerism….’

Thanks to A, and both for the commentary.

Bryan@4 makes the obvious connection about my pseudonym, but it is purely an abbreviation, albeit fortuitous. (But if you ever see a puzzle by “Athenian”…)

Thanks to all for the additional thoughts and insights.

I enjoyed this a lot – and found it much easier than Araucaria’s offering on Thursday. The clues are (generally) inventive and succinct. Loroso had GYPSUM in yesterday’s FT crossword, with a much less transparent clue.

My first attempt at 8d was CALLOW, but this was quickly abandoned when I got 4a.

Good to see a clue for PULITZER PRIZE which doesn’t rely on a homophone!

I messed up properly: I put Overt for 24a and this totally messed up the SE corner for me.

I liked Party Political Broadcast even though I did not work out the parsing at the time.

Not the most difficult Prize puzzle, but it did some time to get into. I liked 4A EPIPHANY, 16D ADDENDUM and STUDIOUS, among this lot of clever surfaces and definitions.

Re 17A INCORPORATED, I think attachment refers to the fact that “inc.” is placed after the (any such) company’s name, as an attachment, you might say.

It’s so obvious once you can see the correct interpretation. I was trying to make a charade of Spirit=DRY and poster=AD whereas it should be Spirit=poster disparaging spirits. How to be baffled by four simple words. Ah well, one lives and learns…..occasionally.