Swore to become a broadcaster, possibly (5)
I believe the answer is:
sower
'a broadcaster possibly' is the definition.
I can't tell whether this defines the answer.
'swore to become' is the wordplay.
'to become' is an anagram indicator.
'swore' with letters rearranged gives 'SOWER'.
Can you help me to learn more?
(Other definitions for sower that I've seen before include "Farm worker" , "Arable worker" , "Worker in field" , "One planting seeds" , "Seedy operative" .)