This an alphabetical jigsaw that I thought I'd try. I got absolutely nowhere. So I went to the 15squared site where the blogger said "If you are new to jigsaws then one trick to learn is to look out for clues where the wordplay only works if the solution is a down entry. Reversal indicators are the most common example of this. Julius kindly provides a few of them to help us here.".
One such answer is "Diocese" but there are six places where that could go.
The commentators seem to think it was quite easy.
Would someone who has done it please explain how they put in the first (say) four entries with absolute confidence.