Not quite every item about it will identify singer (8)
I believe the answer is:
baritone
'singer' is the definition.
(baritone is a kind of singer)
'not quite every item about it will' is the wordplay.
I cannot really understand how this works, but
an anagram of 'not' is 'ton' which is present in the answer.
'about' could be 'a' (abbreviation in Chambers) and 'a' is found in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'identify' is the link.
Can you help me to learn more?
(Other definitions for baritone that I've seen before include "Male singer in boater, strangely" , "Male singer between tenor and bass" , "Male voice with deep register" , "Adult male singing voice" , "One who can sing" .)