Need odd bits of treaty reworked to achieve improved relations (7)
I believe the answer is:
detente
'improved relations' is the definition.
'detente' can be an answer for 'relations' (I have seen 'Relaxed relations ' mean 'detente' so perhaps 'relations' could also mean 'detente'). I'm not sure about the 'improved' bit.
'need odd bits of treaty reworked' is the wordplay.
'odd bits of' indicates alternate letters.
'reworked' indicates anagramming the letters.
The alternate letters of 'treaty' are 'tet'.
'need'+'tet'='needtet'
'needtet' anagrammed gives 'DETENTE'.
'to achieve' is the link.
Can you help me to learn more?
(Other definitions for detente that I've seen before include "Easing of strained relationships between countries" , "The easing of tensions between nations" , "Thaw in relations" , "Easing of hostility between countries" , "Relaxed relations" .)