Grain yield report (4)
I believe the answer is:
seed
'grain' is the definition.
(I've seen this before)
'yield report' is the wordplay.
'yield' becomes 'cede' ('cede' can be a synonym of 'yield').
'report' shows a homophone (sound like).
'cede' sounds like 'SEED'.
(Other definitions for seed that I've seen before include "Drop" , "It can develop into a plant" , "Pip for sowing" , "Propagative part of plant" , "one of the top players" .)