Confusing arrangement surrounding one crop (5)
I believe the answer is:
maize
'crop' is the definition.
(I've seen this before)
'confusing arrangement surrounding one' is the wordplay.
'confusing arrangement' becomes 'maze'.
'surrounding' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'maze' going around 'i' is 'MAIZE'.
(Other definitions for maize that I've seen before include "Cereal crop" , "source of food" , "Indian corn" , "Source of oil" , "American corn" .)