I normally complete the Genius (and The Listener) but I'm afraid Qaos has me well and truly beaten with this one. I've cold-solved over half the clues, entered many of them, got a few clashes but have ground to a halt now and spent a couple of fruitless hours trying to make further progress. Not sure that I want any nudges (yet!) but came here hoping to find a few others scratching their heads too. Ah well, onwards and downwards, I suppose I just need to try and solve more clues and see what emerges. Maybe ignore all letters in the grid so far as they're proving a distraction?