I enjoyed this!, thanks!
8A8AApt letters missing from actress Th_r__n[---] was fun, as
@Velocipedist mentioned, and
12A12AElement in some double-blind experiments[-------] was neat.
I questioned myself on 5D5DThey multiply by dividing[-------] as AMOEBAE but sorted it out with 16A16A123-45-6789, e.g.: Abbr. (well technically not - this one has never been issued)[---].