Serviceman in foreign capital is nosy, amid high tension (6,6)
I believe the answer is:
parish priest
'serviceman in foreign' is the definition.
I can't tell whether this defines the answer.
'capital is nosy amid high tension' is the wordplay.
'capital' becomes 'paris' (capital of France).
'is nosy' becomes 'pries' (to pry is to be nosy or inquisitive).
'amid' indicates putting letters inside.
'high tension' becomes 'ht'.
'pries' inserted inside 'ht' is 'hpriest'.
'paris'+'hpriest'='PARISH PRIEST'
Can you help me to learn more?
(Other definitions for parish priest that I've seen before include "Local minister" , "Ecclesiastic" , "Clergyman" .)