Thought new item dated (9)
I believe the answer is:
meditated
'thought' is the definition.
(meditating is a kind of thinking)
'new item dated' is the wordplay.
'new' indicates anagramming the letters.
'item'+'dated'='itemdated'
'itemdated' anagrammed gives 'MEDITATED'.
(Other definitions for meditated that I've seen before include "Engaged in spiritual contemplation" , "thought" , "Engaged in religious contemplation" , "pondered" .)