Ask for some pointers here.
Update: Despite our success — we nailed it together in a relatively short session of some two hours over breakfast for the first time in a while — we’ve still got a couple bits of confusion that needs sorting.
And I’m gonna keep quiet about possibilities for those who haven’t completed the crossword yet.
28 across: Fine details gains city medal for 5-down before 4-down (9)
We’re stuck on explaining the first portion of the answer.
5 across: Kingdom between 1-across and 2-down added up to plenty! (7)
We couldn’t quite make a neat explanation for this one.