Eight clued words have a mangled creature removed before entry in the grid.
So far I have taken out (anagrams of 2 rats one bird and one mouse from various answers before entry) so 4 more to find with only a few in NW & SE corners to go in.....
33d Perform endlessly Shetland violin with two notes - annoying! (5)
P?A??
pla(y) could be perform endless
gue is the shetland violin with 2 notes...........but how to put them together to make "annoying" ??
11a BBC One release (6) ?????E 4th letter possibly T
13a First he goes crazy about independence, then more evasive (4)