Aspria, I found it relatively straightforward..
As there's so much thematic stuff involved, I won't reiterate the guideline stuff about giving the clues.
37 A. The definition is the last word, in its meaning of 'place'.
33 D One of the six referred to in the preamble.
28 Is clever, I orinally moved the letter to the wrong spot, the wrong word. If you know the 'envoy' the middle part of 28 D should be clearer.