As you broadcast, there's some just reward (5)
I believe the answer is:
strew
'as you broadcast' is the definition.
I can't tell whether this defines the answer.
'some just reward' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'STREW' is hidden within 'just reward'.
'there's' is the link.
Can you help me to learn more?
(Other definitions for strew that I've seen before include "Sprinkle" , "Scatter untidily" , "Scatter, spread around" , "Scatter loosely" .)