Blackberry bush (7)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
bramble
'blackberry bush' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for bramble that I've seen before include "Wild thorny shrub" , "Gather fruit" , "Source of fruit" , "Rough, prickly shrub" , "Thorny bush" .)