People declare a country (6-5)
I believe the answer is:
nation-state
'a country' is the definition.
(I know that Nation State is a type of sovereign state)
'people declare' is the wordplay.
'people' becomes 'nation'.
'declare' becomes 'state' (I've seen this before).
'nation'+'state'='NATION-STATE'
I've seen this clue in The Daily Express.
Want a hint initially instead of a full solution?
Install my app