Planter's need (4)
I believe the answer is:
seed
'planter's need' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for seed that I've seen before include "Germ; top player" , "See 19" , "Propagative part of plant" , "One of the outstanding players in a tournament" , "It can develop into a plant" .)