Gather selectively (4)
I believe the answer is:
cull
'gather selectively' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cull that I've seen before include "Proportionate kill" , "Obtain from a variety of sources" , "Pick (best); kill off (weakest)" , "Gather, select" , "Gather - slaughter" .)