Newspapers etc, note, becoming central (6)
I believe the answer is:
median
'central' is the definition.
(similar in meaning)
'newspapers etc note' is the wordplay.
'newspapers etc' becomes 'media' (newspapers are part of the media).
'note' becomes 'n' (abbreviation).
'media'+'n'='MEDIAN'
'becoming' is the link.
(Other definitions for median that I've seen before include "The middle of a series of values" , "statistical quantity" , "Relating to the middle value" , "In the middle; statistical value" , "Middle point or part" .)