Some parrot I detested upset journalist (6)
I believe the answer is:
editor
'journalist' is the definition.
(senior journalist)
'some parrot i detested upset' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'upset' shows that the letters should be reversed in order.
'rotide' is hidden within 'parrot i detested'.
'rotide' in reverse letter order is 'EDITOR'.
(Other definitions for editor that I've seen before include "Magazine head" , "Redactor" , "Director of publication" , "One prepares a work for publication" , "one in charge of 10 [PRESS GANG] ?" .)