A choice of ways forward when bringing in one crop (5)
I believe the answer is:
maize
'one crop' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for maize that I've seen before include "Indian corn" , "Corn-cob cereal" , "Plant producing sweetcorn" , "plant with ears" , "- maybe staple" .)