50s conflict destroyed arena work (6,3)
I believe the answer is:
korean war
'50s conflict' is the definition.
'korean war' can be an answer for 'conflict' (I've seen this before). I am unsure of the '50s' bit.
'destroyed arena work' is the wordplay.
'destroyed' indicates anagramming the letters.
'arena'+'work'='arenawork'
'arenawork' is an anagram of 'KOREAN WAR'.
Can you help me to learn more?
(Other definitions for korean war that I've seen before include "armed conflict" , "Ninteen fifty to ninteen fifty three conflict" , "1950-53 conflict" .)