Person developing plot heartlessly rearranged broadcast (8)
I believe the answer is:
gardener
'person' is the definition.
(gardener is a kind of person)
'heartlessly rearranged broadcast' is the wordplay.
'heartlessly' means to remove the middle letters.
'broadcast' indicates an anagram.
'rearranged' with its centre removed is 'rearnged'.
'rearnged' with letters rearranged gives 'GARDENER'.
'developing plot' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for gardener that I've seen before include "One grows" , "Plant tender" , "Jesus was mistaken for" , "Red anger of an outdoor worker" , "Plant and veg grower" .)