We have a problem parsing 7d:
Soldier seen climbing over tense leeches (9)
p?r?s?t?s
Probably parasites (leeches)
A chemical element has to be changed from the answer given by the wordplay to give the solution
I know nothing about elements, but the wordplay gives Paranetes (a word, I don't think it has to be defined) and then swap Ne for SI, if those are elements?
"All solutions are defined normally, but the wordplay in each clue leads to a solution where TWO letters require an elementary substitution before entry in the grid."
I know nothing about elements, but the wordplay gives Paranetes (a word, I don't think it has to be defined) and then swap Ne for SI, if those are elements?