Guardian Prize - Last Two

[JJ109]

This is a thematic crossword. Special instructions as follows
Thirty solutions are of a kind, not further defined. The clues for the remaining 36 solutions include a word of the same kind. The initial letters of these words form part of the wordplay for that clue

58a Because of this, shock treatment is held inside (8) _ E _ T _ N _ E
The definition is unclued and should be the name/pseudonym of a crossword compiler.

22a The heart of Schwyz, say (4) A _ T _
I wondered about (C)Anto(N). This would be fine if "anto" was a crossword compiler, but I think it is more likely to be the second type and the "S" for Schwyz must be used in the wordplay.

Many thanks

[iminoz]

58a HECTENCE, complier
shock treatment, ECT, in Hence, 'because of this'

[iminoz]

^...compiler

[JJ109]

Thanks Iminoz -

[iminoz]

22a There is a place called ARTH in the Schwyz district, but I can't find a setter by either name.

https://en.wikipedia.org/wiki/Arth

[JJ109]

Neither can I Iminoz, and I have checked a few sites. As this is the last answer required and I don't send the answers off to the Guardian, I am through for today......but I would have liked to know it for sure! Thanks for your help

[Pianoman12345678]

Anto is a setter for the Guardian. Usually seen in the quiptic slot on a Monday. So your answer of c(ANTO)n would indeed be correct!

[JJ109]

Many thanks Pianoman