Wood, thicket (5)
I believe the answer is:
copse
I believe this is a double definition.
'wood' is the first definition.
(a copse is a small wood)
'thicket' is the second definition.
(I know that thicket can be written as copse)
(Other definitions for copse that I've seen before include "spinney" , "Dense thicket of trees" , "Scope for a small wood" , "Small thicket" , "A little wood" .)