Cryptic crossword No 763

Nicely put together crossword filatore. I don't comment a lot on here but do attempt to try solving most and usually like rather than comment. This was rewarding. Favourites were 1a (well spotted), 13a, 23a, 25a (good surface), 26a and 19d. A couple I wasn't sure about so annotations would be good. One small spoiler....

Thanks for the puzzle Filatore, lots of nice clues here, particularly 1a (very clean), 12a (nice construction), 25a (lol), 6d (smooth) and 22d (clean and neat). Lovely stuff!