This week's Azed is of the sort that I prefer over the frequent Gallicisms and very obscure words (though there are some of the latter). While the instructions may look complex, there is a simplifying factor. Essentially, each group of four clues contains four types - one normal and three that require modification involving a common letter in different ways. Thus once you have identified that letter from one type you know it for the others. The title also contains a heavy hint.