Reporters insist (5)
I believe the answer is:
press
This clue is a double definition.
'reporters' is the first definition.
(journalists, members of the press)
'insist' is the second definition.
(I've seen this in another clue)
(Other definitions for press that I've seen before include "demand immediate action" , "Railroad" , "Crowd - papers" , "Iron (clothes)" , "Harass; media" .)