Most violent end (7)
I believe the answer is:
extreme
I believe this clue is a triple definition!
'most' is the first definition.
(thesaurus)
'violent' is the second definition.
(thesaurus)
'end' is the third definition.
(I've seen this before)
(Other definitions for extreme that I've seen before include "Acute, maximum" , "not least" , "furthest from the centre" , "Furthest or highest degree of something" , "Farthest limit" .)