11a. US prosecutor is on the platform (4) ??I?
15a. Crown the instrument with nothing (7) ?O?O?E?
1d. Expensive, the French part of the church (7) ?T?????
5d. CIA involvement after a message from the heart (7) ?A???A?A
22d. He's slow to travel round the mouth of the Nile (5) ?N?I? - is it SNAIL?