Reportedly yield origin (4)
I believe the answer is:
seed
'origin' is the definition.
(seed is a kind of origin)
'reportedly yield' is the wordplay.
'reportedly' indicates a 'sounds like' (homophone) clue.
'yield' becomes 'cede' (synonyms).
'cede' is a homophone of 'SEED'.
(Other definitions for seed that I've seen before include "Grain" , "High-ranked player in a knock-out tournament" , "Court favourite" , "- Pearl; - capital" , "Source -- germ" .)