Managed to continue in Asian capital once (7)
I believe the answer is:
rangoon
'capital once' is the definition.
(former capital of Myanmar)
'managed to continue' is the wordplay.
'managed' becomes 'ran' (both can mean organised or was in charge of).
'to continue' becomes 'go on' (synonyms).
'ran'+'goon'='RANGOON'
'in asian' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for rangoon that I've seen before include "It's now Yangon in Myanmar" , "old Asian city" , "Former capital of Burma" , "Asian capital" , "Alternative name for Yangon" .)