Considered changing dated item (9)
I believe the answer is:
meditated
'considered' is the definition.
(thesaurus)
'changing dated item' is the wordplay.
'changing' is an anagram indicator.
'dated'+'item'='dateditem'
'dateditem' with letters rearranged gives 'MEDITATED'.
(Other definitions for meditated that I've seen before include "thought" , "Engaged in religious contemplation" , "Engaged in spiritual contemplation" , "pondered" .)