Question Author
Thank you everyone. I think Wonderland and voice are definitely right. 19ac is the starting point for 3down clues which I have not yet done and supplies a letter in a 4th, They are: 19d Laughed to observe next tea being announced (3-4) t - - / - e - d
16d A really good time to produce TV broadcast with 25 (5,4) d - l - - / - i - a (25 is Alice)
20d Take steps to enjoy book afresh - about time (7)
r - - - e - d
Does anyone have any ideas about these please?