Large expanses (6)
I believe the answer is:
tracts
'large expanses' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tracts that I've seen before include "Plots" , "Large areas of land or small pamphlets" , "Expanses of land or pamphlets" , "Extended areas of land" , "leaflets" .)