@smithy,
Interim answers....
7a = Use veil for disguise like the Scarlet Pimpernel. ??U???E (maybe ELUSIVE)?
looks ok
17a = Most generous treatment for miser too. ??????ST ROOMIEST
51a = Break from ritual and hide psychic ability. R?????? RESPITE
62a = M. Pasteur in trouble for not going with the flow.?????E?M ( thought maybe UPSTREAM)
looks ok
72a She goes in, makes crow noises. That's nuts. = ??S?E?? CASHEWS