Thanks
Brendan and Geeker. I had got the last two letters and could easily guess the four letter country, so that was 19ac done, though I thought the definition was weak. That led me to 20d which was easy once I understood what Paul meant by current, which just leaves me with 29ac. Someone suggested that the definition was "producing match in laboratory", but I'm at sea again. Are my crossers right? I have ?L?N?O? By the way, I had originally dismissed the answer to 25 ac as it doesn't mean "cock".
I think my FOI was 16,15 closely followed by 2d. Clearly my LOI will be 29ac. My COIs were my first two 16,15 and 2d, but I also liked 14ac when I finally got it and 5ac. Why oh why did it take me so long to get 24ac. A mystery.