Hi Polly Dee et al,
I refused to be beaten by your conundrum and, by chance, have just found another article on mistletoe and the root system. The word which sprang off the screen was SINKER and I have just checked with the Blessed Chambers and, sure enough, it IS the correct answer.
Incidentally, if you hadn't noticed, the word 'trawled' in my previous post, was a nautical pun...
If I was a dog, my tail would be wagging furiously now!
Best wishes,
Caravaggio