May be unrelated but stiil same (9)
I believe the answer is:
unaltered
'same' is the definition.
(thesaurus)
'may be unrelated but stiil' is the wordplay.
'unrelated' anagrams to 'UNALTERED'.
However, I'm not clear how this is indicated.
Can you help me to learn more?
(Other definitions for unaltered that I've seen before include ""Nothing's been changed!"" , "Remaining the same" , "not revised" , "not varied" , "Still the same" .)