In the East, back it for a gamble (5)

I believe the answer is:

tibet

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

'in the east' is the definition.
I can't judge whether this defines the answer.

'back it for a gamble' is the wordplay.
'back' says the letters should be written in reverse.
'for' says to put letters next to each other.
'a gamble' becomes 'bet' (bet is a kind of gamble).
'it' backwards is 'ti'.
'ti'+'bet'='TIBET'

Can you help me to learn more?

(Other definitions for tibet that I've seen before include "Mountainous Asian region" , "Chinese region" , "High place" , "hilly region" , "Part of Asia" .)

I've seen this clue in the Evening Standard.

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