Absolutely not about the end of summer in the country (6)
I believe the answer is:
Here is my best explanation:
'country' is the definition.
(Norway is an example)
'absolutely not about the end of summer' is the wordplay.
'absolutely not' becomes 'noway' (I've seen this before).
'about' means one lot of letters goes inside another.
'the end of' indicates one should take the final letters.
The final letter of 'summer' is 'r'.
'noway' enclosing 'r' is 'NORWAY'.
'in the' is the link.
(Other definitions for norway that I've seen before include "Grieg, Ibsen country", "Now, Ray, go to the country", "Trondheim country", "Scandinavian country", "European monarchy", "Northern European country", "Any row in this strange country?", "Country of fjords", "Grieg's land" and "Where Quisling was".)