A single article changed in time (4)

I believe the answer is:

item

I'm a little stuck... Click here to teach me more about this clue!

'a single' is the definition.
(thesaurus)

'article changed in time' is the wordplay.
'time' can be anagrammed to 'ITEM'.
Though, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for item that I've seen before include "two with a link" , "Loving couple" , "Time (anag.)" , "Element" , "Two in a romantic relationship?" .)

I've seen this clue in the Evening Standard.

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