Really need to finish this, but I'm struggling today.
16d. TV broadcast with Sheila, to whom no man's a hero (3,5) -I-/--I-- (May be AIR something, but can't see it)
27a. The aristocracy's kindly in Japan? (6) -----S
23d & 22a. Examination previously completed (4,4) -N--/---M
Again, any help gratefully received.