16d Cast as read in '30s Hollywood film credits (3, 7) I was thinking "The Players" but don't know why!
23d Want to be without a button? (6) --n-r-
11a Finished in the frame (6) --a-e-
22a Put in or put on, as both would be relevant (5) No letters for this but the second one is the first letter of 23d and the fourth one is the second letter of the second part of 16d, if that makes sense!