Yield from planned economy rejected (4)
I believe the answer is:
cede
'yield' is the definition.
('cede' can be a synonym of 'yield')
'from planned economy rejected' is the wordplay.
'from' says the answer is hidden in the clue.
'rejected' says the letters should be written in reverse.
'edec' is hidden in the letters of 'planned economy'.
'edec' in reverse letter order is 'CEDE'.
(Other definitions for cede that I've seen before include "Surrender, give up" , "Yield or give up to another" , "Give up (territory)" , "Give up (eg, power)" , "21 across" .)