Thanks everyone for helping so much. AJT asks if there are any general rules. Yes (sorry I didn't mention them before) In 11 of the clues cryptic indications omit reference to parts of the answers to go into the grid. You end up with a person born 100 years ago (which is Joyce Grenfell) and something she was responsible for (which is monologue. If the answer to one of my clues is nuthatch, then the "weight" clue will end in H ans the "nurse" clue will end in T.
Gosh it makes my mind boggle!
Sally