think i've mucked this up
52 across 9 using the same procedure repeatedly(maths) e -c- r -i -e
54 across 10 conventionalised image s-e-e-t-d-
35across 11 mischief:dishonest activity
s- - - - -i-a-s
20 down 8 elevated to the peerage e-n-b-a-
many thanks for any help