Mountainous region tense I predict (5)

I believe the answer is:

tibet

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'mountainous region' is the definition.
'tibet' can be an answer for 'region' (Tibet is a region in Asia). I'm not sure about the 'mountainous' bit.

'tense i predict' is the wordplay.
'tense' becomes 't' (grammatical abbreviation).
'predict' becomes 'bet' (betting is a kind of predicting).
't'+'i'+'bet'='TIBET'

Can you help me to learn more?

(Other definitions for tibet that I've seen before include "High mountainous area" , "Himalayan region controlled by China" , "Region of SW China" , "Dalai Lama's land" , "Autonomous region of China, capital Lhasa" .)

I've seen this clue in The Telegraph.

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