Land matter disheartened revolutionary (7)
I believe the answer is:
country
'land' is the definition.
(I know that land can be written as country)
'matter disheartened revolutionary' is the wordplay.
'matter' becomes 'count' (both can mean to be of significance).
'disheartened' suggests removing the centre (the middle or heart is removed).
'revolutionary' with its centre removed is 'ry'.
'count'+'ry'='COUNTRY'
(Other definitions for country that I've seen before include "Rural" , "Nation" , "See 9" , "land?" , "State; region" .)