As this is last by the late Rev gent, I am trying to finish it, with difficulty. Any of these would help greatly.
15d. Perhaps shortening a film at an unusual showing. (6.3)     A???A?  ??T.        Some sort of 'cut'.?
19d.Automobile award invested in bank. (6).  ?A?B??
3d. Where to get a fix and note couples dance. (6.4)
R???I?   S???        Not certain about the i.