Dylan,
17a = THE (our) + biblical word for worthless around I
Cell 14 - I also had trouble confirming the item. The pair of letters go first, folloewed by the triple. The first letter should have a diacritical mark (like an umlaut)
I'm not a musical expert, but the instructions do seem a bit confusing. Surely the numbers applying to the three exceptions are not strictly opus numbers, but JS numbers. My three numbers are all three digits long. If I prefix them with 'op.' I get completely different works.
Wow, that was difficult, but all done. My only concern is where to find the misprint M. Can only be in one of four clues, not that it really matters, but if anyone can let me know it would be greatly appreciated.
Yes, I see it now. I thought you were referring to the Bad word.
On a somber note, I will miss Schadenfreude, as I imagine will many others. Some brilliant puzzles over the years. My condolences to his/her family.