Sorry, sent last post too soon!
I have nothing for Uva.
For marsupials - I've got the 3 letter word on the far right, reading upwards and this is linked to the word at 28 D, again reading upwards. I also think the word at 17 D - but again reading upwards - is part of this group (they all lack a four-letter ending).
I'm not 100% sure of the 1st unclued, next to 1 A. - at the moment I have it beginning with 'P'.
Can you give me a hint re Uva? All I have as a possibility is the word reading upwards from 25 A.