Hello. What a weird time!!! I hope you are well.
SWMBO forbade me going to visit His Nibs or go to the pub. I grumbled but I guess she was right. Anyway,I nearly did the crossword. Nearly because two (little words) defeat me.
12d river's banks eroded constantly.
I have e?e?. Lots of words and a couple of rivers fit but I can't make sense of any.
The other is 52d. " Each year involves leading intermediate stage". I have ? U? A
Pupa (which is an" intermediate stage " fits but I don't get the rest.