Inevitably 17 & 18 are now clear.
Helen - 17 is a single musical letter for Loudly followed by 6 letters reversed (repelled): 2 letters for tick (as in time) and an animal. Definition is Range
For the first time in a while I managed to get into the online version without having to delete cached data etc. and lo an behold the crossword is there but the clues are missing! Will have to resort to the pdf link.
Thanks mattrom
Just to help anyone who made the same mistake as me, 18d is a generic family - not the family in the long running TV series, which gave me two wrong crossers, which held me up for a long time!
Thanks Yevrah, ironically I can enter solutions though it remains to be seen if I can submit! I won it a couple of weeks ago so maybe I'm black balled...