The most common and most likely answer to this crossword clue is the 7 letter word AIRLINE
A
I
R
L
I
N
E
More clues leading to the result AIRLINE
- Flight organisers in row after broadcast?
- Service provider broadcast part of poem
- Business that takes off?
- Virgin is one that recedes with time, lacking aspiration
- Broadcast policy gets company off the ground?
- Virgin, perhaps Irish, wearing flared style
- Arsenal’s no 1 policy: to keep current manager ultimately in Emirates?
- Broadcast story about northern company supplying transport
- BA, say, would be fine if husband were at the top
- Transport company that’s used by divers
Buddy explains!

The straight part
We know that "BA, say" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ba, say = airline.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 AIRLINE mean?
AIRLINE noun- A company that flies airplanes to transport people and goods.