Question Author
Thanks Iminoz - so presumably 16a is Hassar rather than hag + gar, giving the S for Proposal. The I though came from 15a Cruive (Scottish word for a pig sty... although I have to admit I couldn't parse the rest!
The letters will now be CR _ OVE, parsing this "correctly" this time gives CROOVE and I have just looked this up and it is "a variant of "cruive"
many thanks Iminoz - two more mistakes of mine corrected and it is now finished and I am happy with all the parsing! Thankyou