The most common and most likely answer to this crossword clue is the 7 letter word BOMBERS
I've seen this crossword clue in The Sunday Telegraph
B
O
M
B
E
R
S
More clues leading to the result BOMBERS
Buddy explains!

The straight part
We know that "those in a 5 Down raid perhaps?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case those in a 5 down raid perhaps? = bombers.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 BOMBERS mean?
BOMBERS noun- A military aircraft designed to carry and drop bombs.
- A person who sets bombs, especially as an act of terrorism.
- A bomber jacket.
- A 22-ounce beer bottle.
- A graffiti bomber.
- A large cannabis cigarette.