I have a complete grid but absolutely no idea what this is about. I have 35 letters that look like early English but hours of googling have got me nowhere.
I don't have a clash, but I haven't managed to parse 4d. Perhaps it's there, but I assumed it was a thematic entry to go with two others.
A third of the clues involve deletion of one or more letters from a word. That seems excessive, and is one of the things that make solving the clues so tough.