The most common and most likely answer to this crossword clue is the 7 letter word TELECOM
T
E
L
E
C
O
M
More clues leading to the result TELECOM
Buddy explains!

The straight part
We know that "Broadcasting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case broadcasting = telecom.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 TELECOM mean?
TELECOM noun- Telecommunication or telecommunications.
- A telco (phone company) or telecom company.