Old cases international court read out (8)
'read out' is the definition.
(I've seen this before)
'old cases international court' is the wordplay.
'old' becomes 'dated' (I've seen this in other clues).
'cases' means one lot of letters goes inside another.
'international' becomes 'i' (abbreviation eg in IMF).
'court' becomes 'ct'.
'dated' enclosing 'ict' is 'DICTATED'.
(Other definitions for dictated that I've seen before include "Tidied act up - read aloud to typist (8", "Decreed or tyrannised", "Said something for someone to record".)