200 like us saving gold in mountainous region (8)
I believe the answer is:
caucasus
'mountainous region' is the definition.
'Caucasus' can be an answer for 'region' (Caucasus is an example). I'm not certain of the 'mountainous' bit.
'200 like us saving gold' is the wordplay.
'200' becomes 'cc'.
'like' becomes 'as'.
'saving' is an insertion indicator.
'gold' becomes 'au' (Au is the chemical symbol for gold).
'cc'+'as'+'us'='ccasus'
'ccasus' going around 'au' is 'CAUCASUS'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for caucasus that I've seen before include "Black-to-Caspian Sea range" , "Mountainous area between Caspian and Black seas" , "part of Europe" , "Range of Georgia, etc" , "Black and Caspian sea region" .)