Thanks for the tip on 16d - I also was guessing 'slackers' but wasn't happy with it.
But I'm still stuck on 25, last one to go in.
B * T * E * / O * F
Any phrase I can think of that fits the letters, I can't parse.
Personally I felt very surprised when this 'tribute' appeared without any other notification on the web apart from the Big Dave reference.
I was not alone in feeling a bit put out -
https://twitter.com/enigmatistelgar/status/1667539859794173952?s=46