Gather from a field (4)
I believe the answer is:
reap
'gather from a field' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for reap that I've seen before include "Get -- derive" , "Cut the corn" , "Harvest, garner" , "''As you sow, so you . . . .'' (4)" , "Harvest (a crop)" .)