Briefly tell keen advocate that broadcaster converted them (13)
I believe the answer is:
televangelist
'advocate that broadcaster converted them' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for televangelist that I've seen before include "Revivalist who broadcasts" , "TV preacher" .)