NOTE: henceforth some of these clues may also be from the Telegraph Cryptic as well as the Times cryptic (if that makes any difference with the parsing)...
16d. City that may be built when the incoming waves have been destructive?
NEWCASTLE
9a. Actor's headline portrayal of Saul's conversion
PAUL NEWMAN
1a. Attractive romantic heroine about to be possessed
CATCHY
14a. Party politician may pen article spilling secrets
REVELATORY
12a. Joy's plant, left by bishop
EUPHORIA
Parses for the above please.