Times in shock broadcast (4)
I believe the answer is:
days
'times' is the definition.
(I've seen this before)
'shock broadcast' is the wordplay.
'shock' becomes 'daze' ('daze' can be a synonym of 'shock').
'broadcast' shows a homophone (sound like) (how the word might sound on the radio or TV).
'daze' sounds like 'DAYS'.
'in' acts as a link.
(Other definitions for days that I've seen before include "Sun, Mon, Tues, ..." , "Periods (of week)" , "Units of time" , "See 1 down" , "24-hour periods" .)