Now's the wrong time to constrain mass communications (9)
I believe the answer is:
immediate
'now's' is the definition.
'the wrong time to constrain mass communications' is the wordplay.
'the wrong' indicates an anagram.
'to constrain' means one lot of letters goes inside another (constrain can mean to imprison).
'mass communications' becomes 'media' (I've seen this before).
'time' with letters rearranged gives 'imte'.
'imte' going around 'media' is 'IMMEDIATE'.
(Other definitions for immediate that I've seen before include "Direct" , "Prompt, straightaway" , "Most urgent; current" , "Prompt,straightaway" , "Present" .)