Some reporters reverted to an earlier style (5)
I believe the answer is:
retro
'to an earlier style' is the definition.
(retro means in an old-fashioned style)
'some reporters reverted' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'reverted' shows that the letters should be reversed in order.
'orter' is hidden in the letters of 'reporters'.
'orter' backwards is 'RETRO'.
(Other definitions for retro that I've seen before include "sort of rocket" , "In a backward-looking style" , "Reminiscent of a past style" , "Predatory fish" , "imitating past fashion" .)