Hi Teenieleek,
8a - the "priest" is 6 letters (not 4, like I originally thought) minus it's last letter/shortly around/acquiring "a" then 4 letter "coarse fabric" minus the extra letter.
1d - first 3 letters are a 4 letter "festival" minus extra letter then 3 letter "support" and 3 letter "rubbish" reversed/upset.
20a - What category did you put him in? I know what he does but it doesn't seem to match with any of them.