Row after meeting of countries leads to release (7)
I believe the answer is:
unchain
'release' is the definition.
(unchaining is a kind of releasing)
'row after meeting of countries' is the wordplay.
'row' becomes 'chain'.
'after' is a charade indicator (letters next to each other).
'meeting of countries' becomes 'un' (United Nations).
'chain' after 'un' is 'UNCHAIN'.
'leads to' is the link.
(Other definitions for unchain that I've seen before include "Release from bondage" , "Release from fetters" , "Free" , "loose" .)