Question Author
12 a Jam for bear -t-c-
20d to some degree lost in 36a p-r-l- (36a answer was Celebration clue was Knees-up with its quota of A-listers?
33a notes about a substance from river d-n-b-
52a formally appealed for last of white material s-e-e
52d give directions to uppish opponent loudly and chase see off (assuming 52a starts with s!!
Thanks for your help Elliemay