Gather gradually (5)
I believe the answer is:
glean
'gather gradually' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for glean that I've seen before include "Gather (info or the harvest)" , "Gather, pick up" , "Pick up (information)" , "Gather (after reapers)" , "Collect grain (or information?)" .)