Neighbouring Oblast is ready to support Kharkiv, primarily (7)
I believe the answer is:
donetsk
'neighbouring oblast' is the definition.
The definition suggests a singular noun which matches the answer.
'ready to support kharkiv primarily' is the wordplay.
'ready' becomes 'done' (eg food which is done is ready to eat).
'primarily' says to take the initial letters.
The initial letters of 'to support kharkiv' is 'tsk'.
'done'+'tsk'='DONETSK'
'is' is the link.
Can you help me to learn more?
(Other definitions for donetsk that I've seen before include "Industrial city" , "Ukrainian city" .)