Thanks zozozo
I didn't know the slang for safe, but I did know safe breaker. The answer is what I thought, but I can't parse it all.
I've also found a capital city but it means the answer I had for O is wrong and I can't explain the parsing, but I assume the answer to the clue is reversed.
Finally, I now see why my answer for the A clue was right. Duh!
So, just O to get. I must try and think of beasts as On Cue was wrong.