Having called through, read out, as pre-planned (8)
I believe the answer is:
arranged
'planned' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for arranged that I've seen before include "Fixed" , "Placed attractively as with flowers" , "Ordered" , "Scored" , "Settled plans for something" .)