Sensationalists, say, seen in good crowd (6,5)
I believe the answer is:
gutter press
'sensationalists' is the definition.
(sensationalist journalists)
'say seen in good crowd' is the wordplay.
'say' becomes 'utter' (to utter something is to speak or say it).
'seen in' indicates putting letters inside.
'good' becomes 'g' (abbreviation).
'crowd' becomes 'press' (to press can mean to crowd around).
'g'+'press'='gpress'
'utter' inserted into 'gpress' is 'GUTTER PRESS'.
(Other definitions for gutter press that I've seen before include "Newspapers engaging in sensational journalism" , "4 [RAG] as an example" , "collection of dirty rags" , "It sensationally reports" , "Muck-raking journalists" .)