Some sandy summits around meandering desert under pressure (8)
I believe the answer is:
stressed
'under pressure' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for stressed that I've seen before include "under force" , "Emphasized or strained" , "anxious" , "Subjected to strain or emphasised." , "Harassed, strained" .)