Leaders sacked in bent city body (6)
I believe the answer is:
entity
'body' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for entity that I've seen before include "Something with independent existence" , "Anything that exists" , "A thing with distinct and independent existence" , "Individual being" , "Something existing in its own right" .)