Conspiracy to get some land (4)
I believe the answer is:
plot
This clue is a double definition.
'conspiracy' is the first definition.
(a conspiracy is a secret plot)
'some land' is the second definition.
(thesaurus)
'to get' is the link.
(Other definitions for plot that I've seen before include "Small piece of ground" , "Ground - plan" , "Area of ground; storyline" , "Storyline or piece of land" , "See 12 Across" .)