Brow of elevated promontory topped by bare tree (8)
I believe the answer is:
forehead
'brow' is the definition.
(synonyms)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for forehead that I've seen before include "Upper part of the face" , "Front of the head" , "Frontal bone" , "Brow" , "Space above the eyes" .)