Hi Loubylou, I agree that there were quite a few obscure words in today's crossword, like the gorge in 9d (never heard of that term) 20d (never heard of that) and 11a (which I'd never heard of either, but it was gettable as it was a primary, and just needed a google search to confirm, so I'm not complaining about that!)
I think 1a was a really poor clue since the Marilyn part of the clue (the first word) was somebody not at all well known. The second word is a 3-letter abreiviation for an endearment or lover, with the R of rusty inserted into it.