Been disturbed by brutal assassination of one liberal (10)
I believe the answer is:
benevolent
'one liberal' is the definition.
(thesaurus)
'been disturbed by brutal assassination of' is the wordplay.
I cannot really see how this works, but
an anagram of 'been' is 'bene' which is present in the answer.
'of' could be 'o' and 'o' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for benevolent that I've seen before include "Well disposed" , "Well-meaning, kindly" , "Showing kindness" , "Well meaning, kindly" , "Kind" .)