Abandon unproductive area (6)
I believe the answer is:
desert
This clue is a double definition.
'abandon' is the first definition.
(desert can mean to leave or abandon)
'unproductive area' is the second definition.
(I've seen this before)
(Other definitions for desert that I've seen before include "Walk out on" , "Abandon in arid place" , "sands" , "Abscond from forces" , "Abandon in wasteland" .)