Sterile (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
barren
'sterile' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for barren that I've seen before include "Infertile, unable to grow things" , "Bare and bleak" , "Empty" , "Sterile" , "Arid, infertile" .)