The most common and most likely answer to this crossword clue is the 8 letter word BRIEFING
I've seen this crossword clue in Financial Times
B
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F
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More clues leading to the result BRIEFING
Buddy explains!
The straight part
We know that "Instruction for barristers and aircrew" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case instruction for barristers and aircrew = briefing.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 BRIEFING mean?
BRIEFING verb- To summarize a recent development to some person with decision-making power.
- To write a legal argument and submit it to a court.
- A short and concise summary of a situation.
- A presentation of information or instruction; the meeting at which it is presented.