The most common and most likely answer to this crossword clue is the 7 letter word SKYJACK
I've seen this crossword clue in The Daily Telegraph
S
K
Y
J
A
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K
More clues leading to the result SKYJACK
Buddy explains!

The straight part
We know that "Make a takeover bid in the air" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case make a takeover bid in the air = skyjack.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 SKYJACK mean?
SKYJACK verb- To steal or commandeer (hijack) an airplane, usually by threat of violence to the passengers.
- A platform that can be raised using a hydraulic scissor lift.