Parts of parish records on the radio (5)
I believe the answer is:
roles
'parts' is the definition.
('role' can be a synonym of 'part')
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for roles that I've seen before include "Actors' parts" , "Theatrical parts" , "Dramatic parts" , "Parts in a play" , "Parts in plays" .)