Thanks xwordfan, that makes sense of the definition but I don't understand how we get ''ceremony"- being dim, I'm sure. And while we're at it, struggling to parse 22a, 47a and 52a. With 47a I understand ( I think) that we have to subtract 3 letters from a bigger word meaning, undecided, but I don't understand what those three words have to do with 'study'.