(18a) The last word heard from US spies ring as they leave Brescia, or Rome, or Milan? (4)???O.
(30a) Resident of Mount Olympus will accept nothing that is not evil. (4) G?O?.
(32a) Scots Gaelic speaker calls home from the Big Apple to secure capital. (6) ?L?A?Y.
(33a) Foreign spies abandon Brescia and turn what's left of it over to a non-Italian. (4) ?ER?.
(35d) Faith expresses her exasperation with top ranking. (5) ?AH?I.