Well!!!! What a trial.
Started at 3.00pm as usual and read all the clues. After an hour I'd only got one, which was 4d and I wasn't even sure about that, as the spelling is off, though I gather you can use a different abbreviation for South Africa.
So, I resorted to cheating and looked up some on DanWord to get me going and checked some of my answers there. There are at least three words I didn't know - 3d, 7d and 13, 2. I couldn't parse half the answers - 7 across clues (1, 10, 11, 13/2, 23, 24 and 25) and 6 downs (5, 7, 15, 21, 22 and 23) . I'm with Chris, some of the clues were definitely odd, eg 9d.
I've now read the grid and am gratified to find I'm not the only one who struggled, so don't bother to explain any parsing. I can now throw the newspaper away. I shall avoid Enigmatist in future. He is clearly beyond me.
FOI 4d, LOI 23d and CODs 12ac and 19ac.