Neophyte, if you take the the 3rd letter out of a certain infernal poet, it should work.
Re 'Fish round jetty..' the semi aquatic predator isn't a 'gator' it's the other one and the jetty is just reversed after it to give a fish.
As for the 8 cells, in the end I highlighted all the the 'last word' cells and worked out that the end game must contain them all. The last letter occurs in the top line but that's not the one you want, I don't think.