Profit derived from seed crop (8)
I believe the answer is:
proceeds
'profit' is the definition.
(I've seen this before)
'derived from seed crop' is the wordplay.
'derived from' indicates an anagram.
'seed'+'crop'='seedcrop'
'seedcrop' is an anagram of 'PROCEEDS'.
(Other definitions for proceeds that I've seen before include "Return" , "Continues" , "Returns" , "takes steps" , "Passes on" .)