News sources found in some diaries (5)
I believe the answer is:
media
'news sources' is the definition.
(I've seen this in another clue)
'in some diaries' is the wordplay.
'in' says the answer is hidden in the clue.
'MEDIA' is hidden in the letters of 'some diaries'.
'found' is the link.
(Other definitions for media that I've seen before include "means for spreading news" , "journalists' outlets" , "Vehicles" , "Agencies" , "Aimed (anag.)" .)