Drive takes in famous mount in eastern state (7)
I believe the answer is:
vietnam
'eastern state' is the definition.
'Vietnam' can be an answer for 'state' (Vietnam is an example). I am not certain of the 'eastern' bit.
'drive takes in famous mount' is the wordplay.
'drive' becomes 'vim' (I've seen this in another clue).
'takes in' is an insertion indicator.
'famous mount' becomes 'etna' (Etna is an example. I am not sure about the 'famous' bit.).
'vim' enclosing 'etna' is 'VIETNAM'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for vietnam that I've seen before include "East Asian country" , "Hanoi's country" , "Country at war with itself from the 1950s to 1970s" , "SE Asian country once at war with USA" , "Communist state of Indochina" .)