One selling farmland that can be brought back into use (9)
I believe the answer is:
reparable
'one selling farmland that can be brought back into use' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?
'one selling farmland' is the wordplay.
'one selling' becomes 'rep' (I've seen this in other clues).
'farmland' becomes 'arable' (arable land is land that can be farmed).
'rep'+'arable'='REPARABLE'
Can you help me to learn more?
(Other definitions for reparable that I've seen before include "Able to be fixed" , "Able to be rectified" .)