Country showing activity about a volcano (7)
I believe the answer is:
vietnam
'country' is the definition.
(I know that Vietnam is a Asian country)
'activity about a volcano' is the wordplay.
'activity' becomes 'vim' (vim is a kind of activity).
'about' indicates putting letters inside.
'a volcano' becomes 'Etna' (Mount Etna).
'vim' enclosing 'etna' is 'VIETNAM'.
'showing' is the link.
(Other definitions for vietnam that I've seen before include "S.E. Asian republic" , "Country in Indochina" , "East Asian country" , "Asian country, divided north and south from 1954 to 1975" , "SE Asian country once at war with USA" .)