Miles, totally agree, a stinker indeed. But I think the parsing of 49d might actually be - mentioned = TOL(D) with D for down going 'under' or deleted, plus the band REM, and the whole lot reversed, or 'picked up'. That puts it more in line with this setter's love of deletions, reversals, and obtuse constructions, because out of 60 clues 40 rely on deletions, inclusions, reversals, or anagrams, and the rest are just a tedious, boring slog.
Not a single attempt at cunning wit, or punning wordplay. A clue is supposed, after some thought, to lead one to the answer; but invariably I find myself guessing the definition, and then spending all my time trying to figure how it fits the clue. I can't remember the last time I gave a little snort of appreciation for the setter's skill as the penny finally dropped on a clever clue.
Besides which, everyone I know humorously refers to the wine as mer-lott, so no homophone there for us. On the other hand, none of us had ever heard of 'Stan' who makes his second appearance in a fortnight.
Cultural references at The Times Jumbo have certainly changed - and not for the better.