I also found this quite difficult today, but I love 19a. Great clue. Anyway, stuck on left-hand side. Maybe some tips would help.
9a: exchange about privies to be seen as premature (1,3,8). I think it's an anagram but can't get it. A bit [I think the second word is bit] p???e?u?
22d. number provided by Support, ringing Personnel (5) i?r?e
18d. crazy daughter escaped. (7) ???i?ded
17a - no letters at all. Clue is topless undergarment is kind of current (4). Is the 1st letter r????
Thanks.