Date and hour arranged, as written (8)
I believe the answer is:
authored
'written' is the definition.
(authoring is a kind of writing)
'date and hour arranged' is the wordplay.
'and' says to put letters next to each other (I've seen this in other clues).
'arranged' indicates anagramming the letters.
'date' put after 'hour' is 'hourdate'.
'hourdate' is an anagram of 'AUTHORED'.
'as' acts as a link.
(Other definitions for authored that I've seen before include "Wrote" , "written" .)