aristo, you are completely correct, how does one get Oslo from loss, well, one doesn't and I am an idiot.
When I wrote the clues, I was toying with an anagram of Solo for Oslo and wrote down 'Loss adjustment' and realised it wasn't an anagram so binned it as a bad idea, but when I came to typing them up, I must have forgot and just gone ahead with it without noticing. Oh well, I'll add it to my experiences in my learning curve.
I had 70 clues to write for this one and things must have just got mixed up with that one because I was working fast to complete it. I would say 'it won't happen again' but I guess it will some time.
Hope it gave you some enjoyment anyway.