clairière

glade, clearing (an area of land within a wood or forest devoid of trees)

“Nous occupions, en cet endroit. Le centre d'une vaste clairière, entourée par les hautes arborisations de la forêt sous-marine.” — At this locality we stood in the center of a huge clearing surrounded by the tall tree forms of this underwater forest.

From clair + -ière.