Small wooded area (5)
(Other definitions for copse that I've seen before include "Small group of trees" , "Dense growth of shrubs or trees" , "Dense growth of bushes or trees" , "A little wood" , "spinney" .)
(Other definitions for grove that I've seen before include "Group of trees or a small wood" , "Hurst" , "Small wood or avenue of trees" , "Small growth of trees" , "Small wooded area" .)