Relaxed after countries coming together are insulting (7)
I believe the answer is:
unwound
'relaxed' is the definition.
('unwind' can be a synonym of 'relax')
'after countries coming together are insulting' is the wordplay.
'after' says to put letters next to each other.
'countries coming together' becomes 'un' (United Nations).
'are insulting' becomes 'wound' (people who are insulting might wound others).
'un' next to 'wound' is 'UNWOUND'.
(Other definitions for unwound that I've seen before include "Began taking things easy" , "Bandages thus removed" , "Unravelled" , "Slackened, relaxed" , "No longer coiled" .)