Stage the farm plot is worked (8)
I believe the answer is:
platform
'stage' is the definition.
(I've seen this before)
'the farm plot is worked' is the wordplay.
'is worked' is an anagram indicator.
'farm'+'plot'='farmplot'
'farmplot' with letters rearranged gives 'PLATFORM'.
(Other definitions for platform that I've seen before include "Raised level surface" , "Dais; political party's declared policy" , "Part of Victoria" , "declared party policy" , "There's a place for the train" .)