Thanks for 18d & 21acr, (Quisling)
Still flummoxed by 9d though.
I can't get Viz out of my head for the comic clue.
& I have a feeling that if it's a person, I'm not going to know who they are.
Ceffie, you're right about the comic, magazine. The beautfully parsed hints gven earlier lead you to the name of an official, a foreign official, not the name of a person.
It is Viz, ceffi. That is is the usual abbreviation of id est, then R for right. The Grand ****** was the title of the Prime Minister of Turkey until 1922, the end of the Ottoman Empire