Backward-looking group of reporters with a bygone style (5)
I believe the answer is:
retro
'with a bygone style' is the definition.
(retro is an old-fashioned style)
'backward-looking group of reporters' is the wordplay.
'backward-looking' is a reversal indicator.
'group of' indicates a hidden word (group of letters from the clue).
'orter' can be found hidden inside 'reporters'.
'orter' written backwards gives 'RETRO'.
(Other definitions for retro that I've seen before include "Backward looking" , "Imitating an older style" , "Reliving the past" , "bit of nostalgia" , "Type of rocket; backward-looking" .)