Story of unfair dismissal had hippie all worked up (12)
I believe the answer is:
philadelphia
'story of unfair dismissal' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'had hippie all worked up' is the wordplay.
'worked up' indicates an anagram.
'had'+'hippie'+'all'='hadhippieall'
'hadhippieall' with letters rearranged gives 'PHILADELPHIA'.
Can you help me to learn more?
(Other definitions for philadelphia that I've seen before include "US federal capital, 1790-1800" , "City where the American Declaration of Independence was signed" , "US city on the Delaware river" , "US Quaker city, former capital" , "location for Independence Day" .)