Still bothered by a few in the bottom right :
49A - More pleasant information about subject in school (12)
?????R?????N
38D - Tearing one's allowance of fabric (10)
???E???I??
41D - In a chair, perhaps starts to repair embroidered cape sleeve (9)
R?C??????
&
54A - One local lad heading off to college is like an ape (9)
I?I?A???? - is this IMITATING or IMITATIVE? I can't work out the parsing
Obviously this isn't all I'm confused by, but assistance with these may help me with the others