And you mostly saw broadcast today (8)
I believe the answer is:
nowadays
'today' is the definition.
(I know that today can be written as nowadays)
'and you mostly saw broadcast' is the wordplay.
'mostly' means to remove the last letter (most but not all of the word).
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'and'+'you'='andyou'
'andyou' with its last letter taken away is 'andyo'.
'andyo'+'saw'='andyosaw'
'andyosaw' anagrammed gives 'NOWADAYS'.
(Other definitions for nowadays that I've seen before include "Gestures of respect" , "Currently" , "today!" , "In the 21st century" , "At this juncture" .)