Event is broadcast to people (5,4)
I believe the answer is:
relay race
'event' is the definition.
(relay race is a kind of event)
'broadcast to people' is the wordplay.
'broadcast' becomes 'relay' (relay can mean to broadcast or pass on).
'to people' becomes 'race' (people can mean a national group or race).
'relay'+'race'='RELAY-RACE'
'is' is the link.
(Other definitions for relay race that I've seen before include "Team contest" , "Speed contest with teams of four runners" , "Foot speed contest passing batons" , "Ace rarely placed in team event" , "Baton-passing event?" .)