Please allow me to offer some thoughts on the 'other site' debate.
I've returned to tackling the Listener after a 20+ year break (work, family, other interests, all the usual). Back then I was moderately successful with the Listener, Azed, New Statesman, Crossword Club etc, in what was of course a pre-digital age. When a stinker got the better of me, I had no option but simply to ignore/abandon it.
Even now I can't devote every waking hour to puzzles, so having access to a little help when needed pushes me on to try and complete. Indeed, I usually glance at this and the other site to see what the 'experts' say, as this may determine whether I bother. In the case of this puzzle, the positive comments made me give it a real try (I'm about halfway through).
The information given on the other site was useful, but only as a way in - the puzzle still needs solving, and simply understanding some of the methodology isn't a guarantee of a completed or correct grid. Is this 'cheating'? Of course not. No more so than bashing Google or, back in the day, heading off to the local library to plough through reference books. I'm on the side of Roddy, who clearly wanted more people to discover the pleasure (and pain) of advanced cryptics rather than keeping them the preserve of a small self-appointed elite.
What I would say is that the preambles now appear more convoluted than those of two decades and more ago. But, equally, the ingenuity of this puzzle and a couple of others recently is remarkable.