4a. be in session. S?T
51a. grand total. ??T?R?T?
70a. last. ??D?O?T
67a. equal terms. P?R???
72a. turn loose. ??T ????
44d. polite social utterances. P???S?N?????
63d. turn something on its head. I?????
56d. great happiness. ?C????Y
47d. dated term for women. T?? ?A?R ???