The most common and most likely answer to this crossword clue is the 7 letter word RELAYED
I've seen this crossword clue in The Daily Telegraph
R
E
L
A
Y
E
D
More clues leading to the result RELAYED
- Revolutionary American university in revolutionary broadcast
- Passed on, put down in grass
- Genuine assistance for auditor is passed on
- Passed on message about new delay
- Journalist supporting race broadcast
- Broadcast race, then hack
- Amateur entering pipe operated in shifts
- Broadcast set out again for an audience
- Ivy League university raised in revolutionary broadcast
- Newsman following race broadcast
Buddy explains!

The straight part
We know that "broadcast" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case broadcast = relayed.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does RELAYED mean?
RELAYED verb- To release a new set of hounds.
- To place (people or horses) in relays, such that one can take over from another.
- To take on a new relay of horses; to change horses.
- To pass on or transfer (information).