Album with 'Time' becoming timeless (9)
I believe the answer is:
immutable
'timeless' is the definition.
(thesaurus)
'album with time becoming' is the wordplay.
'with' means one lot of letters go next to another.
'becoming' is an anagram indicator.
'album' after 'time' is 'timealbum'.
'timealbum' with letters rearranged gives 'IMMUTABLE'.
(Other definitions for immutable that I've seen before include "Changeless" , "Not able to be changed" .)