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Fairly gentle and quick for this sort of thing.
I rarely try jumbos, but as American it's fun to see if I can solve the long quote. This year's quote was amusing and not too challenging to deduce.

Go on then put me out of my misery

Stuck on 68 d
Trump’s behind enforcing secret state sources review

…e.s

assess
ass - US for ARSE
Enforcing Secret State (sources)

Thanks - much appreciated

Last one, now getting annoying:
29a: Working Scot’s terrible overheads.
O_C_S_S. Pretty sure the crossers are correct, and guess it involves an anagram of Scot/s.

It’s oncosts

On for working then an anagram of Scots

Oncosts?

You beat me to the worm birder!

Cyclops should have added a picture of Eric M to assist us with the quote.