LAST 3 TO GET
45) Rings in Poland (4)
49) You could do this in the sea or in a boat (6)
50) Felines fall in a heap (8)
Have seen 50 answered as Haystack and Cataract but I am still confused.
All help appreciated
The only argument I saw given for haystack was that it includes CATS reversed.
I can see CAT in cataract (a waterfall) and maybe CAR (a heap) backwards, but I don't know why the clue says felineS (plural). I can also see CAT and ACT (cat anagram) and an A, but can't see where the R comes from