Distribute in just rewards (5)
I believe the answer is:
strew
'distribute' is the definition.
(I know that strew is a more specific form of distribute)
'in just rewards' is the wordplay.
'in' says the answer is hidden in the clue.
'STREW' is hidden within 'just rewards'.
(Other definitions for strew that I've seen before include "Scatter untidily" , "Scatter loosely" , "Sprinkle" , "Scatter, spread around" .)