great stuff, i mostly got stuck on 14a... and i got 5d from the def, i didnt really get how 7d relates (other than directionally, as that penny just dropped)
I like to solve 11s and up on paper, so this is an artificial time; just wanted to let you know that I really liked 3A, 14A, 3D, and 5D. Conventionally speaking, I'm not sure how people feel about 1D—it seems fair-ish because the letters are at least being removed in the correct order, but I'd prefer they were consecutive. As for 10D, I think some people would call this double-use of "change" a bit cheat-y. That said, I'd rather you try stuff with a good surface than stick to the confines of what's popular but produce stale clues. :)