Forest clearings (6)
I believe the answer is:
glades
'forest clearings' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for glades that I've seen before include "Open spaces in woods" , "Open spaces in forest" , "Clear tracts in the middles of woods" , "Clear tracts in the middle of woods" , "Open spaces in forests" .)