I really enjoyed this one, but then Azed has long been my favourite crossword.
As a Sydneysider, even I wasn't familiar with the slang word in 25 down, and was scratching my head over the "feature" in 6a.
Sydney harbour feature, note, in papier-mache (12)
I have the answer, and wonder if it refers to this
https://en.wikipedia.org/wiki/Harry%27s_Cafe_de_Wheels
although that seems very obscure. Is there a different reference?