Country’s silence, then it’s erupting (13)
I believe the answer is:
liechtenstein
'country's' is the definition.
(Liechtenstein is an example)
'silence then it's erupting' is the wordplay.
'erupting' is an anagram indicator.
'silence'+'then'+'it'='silencethenit'
'silencethenit' with letters rearranged gives 'LIECHTENSTEIN'.
(Other definitions for liechtenstein that I've seen before include "Principality between Austria and Switzerland" , "Landlocked Alpine principality, capital Vaduz" , "Principality of central Europe" , "European principality, capital Vaduz" , "bit of Europe" .)