The extra words match the 'jumbles'. Think DREADful puzzle.
However I cannot find the hidden word which I am thinking should be P****A. Any hint from anyone?
Yes, thanks pkd! The F is required in 7d, but both the M and H in 31d seem superfluous to me. As for the connection, I am still a bit in the dark about how it is connected to the jumbles, which is what I first thought must be the answer.
Firstly, thanks to Meursault, I've found the blighter. However the post at 31 is confusing me - for instance, on jumble has YCT or YTO, neither of which can I relate to any of my extra words.
Yes, you're right PKD. I hadn't paid a lot of attention to it since solving the clue, though clearly one of those words was extra. But there is a Mount Wellington in Tasmania, where the fern is also found...