Mountainous area of Libyan Desert (5)
I believe the answer is:
andes
'mountainous area' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'of libyan desert' is the wordplay.
'of' indicates a hidden word.
'ANDES' is hidden in the letters of 'libyan desert'.
Can you help me to learn more?
(Other definitions for andes that I've seen before include "Great S American mountains" , "South American mountain system" , "Danes in S American mountains" , "World's longest mountain range" , "Great mountains of western S America" .)