Media hasn't succeeded with old forecast (8)
I believe the answer is:
presaged
'forecast' is the definition.
(I've seen this before)
'media hasn't succeeded with old' is the wordplay.
'media' becomes 'press' (the press is part of the media).
'hasn't' suggests deleting specific letters.
'succeeded' becomes 's' (genealogical abbreviation).
'with' means one lot of letters go next to another.
'old' becomes 'aged' (similar in meaning).
'press' with 's' taken away is 'pres'.
'pres'+'aged'='PRESAGED'
(Other definitions for presaged that I've seen before include "Foreseen" , "Foreshadowed, was an advance sign of" , "predicted" , "Forecast" , "Foresaw - red pages (anag)" .)