10a Balkan capital as good as new with new conclusion (8)? - r - s - i - a.
22d King George's volcano on the border (6)? - r - t - a.
There's something about words with no first letter that fool me completely.
Well blow me down for a daft idiot. Gretna indeed - my mother in law's birthplace (as she keeps reminding us). And I should have got Pristina. Many thanks to you all.