Why did Grayson Perry win this year’s Turner Prize, asks Adrian Searle. “Grayson Perry is, at least in terms of his self-constructed public image and his candid interviews, an interesting, complicated character. But he makes middling, minor art. What counts most, perhaps, is Perry’s invented alter ego, Claire, who is exactly the kind of creation the media loves. Yet I have always wondered what the pots, the drawing, Perry and Claire have to do with one another – apart from all being Perry’s invention, all aspects of Perry.”