Operatic melody about large country (7)
I believe the answer is:
algeria
'country' is the definition.
(I know that Algeria is a country)
'operatic melody about large' is the wordplay.
'operatic melody' becomes 'aria' (I've seen this in another clue).
'about' is an insertion indicator.
'large' becomes 'lge' (I can't justify this - if you can you should give a lot more credence to this answer).
'aria' enclosing 'lge' is 'ALGERIA'.
Can you help me to learn more?
(Other definitions for algeria that I've seen before include "republic in Africa" , "North-west African country" , "It lies between Morocco and Tunisia" , "N. African country" , "country in Africa" .)