Cassady for one embracing power in mountainous land (5)

I believe the answer is:

nepal

I'm a little stuck... Click here to teach me more about this clue!

'mountainous land' is the definition.
(I've seen this in another clue)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for nepal that I've seen before include "Mountainous country" , "Gurkha homeland" , "Gurkhas' homeland" , "somewhere in the Himalayas" , "place in the mountains ..." .)

I've seen this clue in The Independent.

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