In Homograms IV, there are 12 clues (two sets of 6) that involve two different pairs of changes before they are written in the grid. In one set, the subsidiary indication clues a homonym of the definition, and the grid entry is an anagram of the homonym. In the other set, the subsidiary indication clues an anagram of the definition, and the grid entry is a homonym of the anagram. Clear?
The solving method was new to me. Homograms III (No.879) was published in 2009, about when I was starting to solve EVs, but I think I missed it.