But I too had reservations about the MUNICH clue, which is a bit macabre to say the least. First, I think it unfortunate to say ‘First M.U. next Israelis competed here’ when what is clearly alluded to is, as you say, ‘first M.U. next Israelis died here in large numbers.’ And second, of course, M.U. didn’t compete there — the Busby Babes refuelled in Munich on their way home from competing in Belgrade, which removes the &littish justification for the wording, as far as I can see. Sorry for the gripe but I did think this was a little questionable.

I was quite relieved that the existence of the Nina was given away.
Up until then, this puzzle had been quite a struggle here. I had to resort to dictionaries,
but in the case of two of the down clues, they weren’t very helpful.

One internet site has a nice picture of a MELAMINE plate. I couldn’t find the tableware
connection in the usual references. I threw in MEGABITE to fill the last gap!
Another internet site suggests that A CAPELLA is the Latin version of A CAPPELLA.

Perhaps Anagram Clues would’ve been fairer in 5dn and 15dn?