Thanks Brendan, Buzzybee and Prospero
I had got these answers
I have all but two left now and have the first letter of the "Firmly established, though parts of rod are missing."
Removing the wrong D gives me W???G?N?E. I'm assuming it's a special one as I haven't found them all.
Of course removing the D means I have still to get They support retirees.) I have B???T?RS. Is this another theme word?
I have found it difficult to locate all the theme words on wikipedia. I'm not familiar with the theme. My husband, who is very knowledgeable about classical music, doesn't like Wagner, so he hasn't been much help.
What I have found most irritating about this crossword is the difficulty recording and cross-referencing the clues and answers. I'm constantly shuffling bits of paper!