Identify another one's guilt (6,3)
I believe the answer is:
single out
'identify' is the definition.
(thesaurus)
'another one's guilt' is the wordplay.
'another' is an anagram indicator.
'ones'+'guilt'='onesguilt'
'onesguilt' is an anagram of 'SINGLE OUT'.
(Other definitions for single out that I've seen before include "Choose" , "Select from group" , "record on release" , "Pick" .)