Bring down news boss elevated by media (7)
I believe the answer is:
depress
'bring down' is the definition.
(depressing is a kind of bringing down)
'news boss elevated by media' is the wordplay.
'news boss' becomes 'ed' (I've seen this in other clues).
'elevated' shows that the letters should be reversed in order.
'by' says to put letters next to each other.
'media' becomes 'press' (I've seen this before).
'ed' reversed gives 'de'.
'de'+'press'='DEPRESS'
(Other definitions for depress that I've seen before include "Make sad or gloomy" , "Bring down" , "Make downhearted" , "Put dent in or make dismal" , "Push, get, down" .)