Country behind round well shelled by a soldier (7)
I believe the answer is:
belgium
'country' is the definition.
(Belgium is an example)
'behind round well shelled by a soldier' is the wordplay.
'behind' becomes 'bum' (synonyms).
'round' is an insertion indicator.
'shelled' means to look at the middle letters (the outer letters or shell are removed).
'by' is a charade indicator (letters next to each other).
'a soldier' becomes 'GI' (GI can mean a US soldier).
The middle letters of 'well' are 'el'.
'el'+'gi'='elgi'
'bum' enclosing 'elgi' is 'BELGIUM'.
(Other definitions for belgium that I've seen before include "European nation" , "Country north of France" , "Glib emu to be found in the country" , "Country of Europe" , "Home of EU headquarters" .)