Gather, as crops (4)
I believe the answer is:
reap
'gather as crops' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for reap that I've seen before include "Glean or cut as harvest" , "'As you sow, so shall you . . . .'" , "Derive as advantage" , "Harvest, garner" , "''As you sow, so you . . . .'' (4)" .)