Grade the produce harvested (8)
I believe the answer is:
gathered
'harvested' is the definition.
(thesaurus)
'grade the produce' is the wordplay.
'produce' is an anagram indicator.
'grade'+'the'='gradethe'
'gradethe' anagrammed gives 'GATHERED'.
(Other definitions for gathered that I've seen before include "Brought together in one place" , "The grade (anag.)" , "assumed" , "Collected in one place and concluded" , "Drew" .)