Wow, this one was a doozy. I got it all eventually, but I do have a few parsing queries if anyone could lob me a hint or two...
28 wordplay ‘Cored wood to make flutes and harp-like instrument’
42 wordplay ‘Harangue the established order noiselessly’
2 wordplay ‘Northern race in Biblical location’
31 ‘Helpless giggling with no anger on Thursday — could be next after one of three’
Muchly obliged.