The most common and most likely answer to this crossword clue is the 4 plus 3 letter word LASH OUT
I've seen this crossword clue in The Times
L
A
S
H
O
U
T
More clues leading to the result LASH OUT
- Tear a strip off wood dressed by lumpkin
- Attack devil finally with a yell
- Attack the French and yell
- Splurge in US city, initially with round of drinks
- The French bay is severely run down
- Half of lads call for strike
- The French scream and throw a wobbly
- The French cry “Attack!”
- In city, call to spend extravagantly
- Verbally attack the French, and yell
Buddy explains!

The straight part
We know that "Attack" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case attack = lash out.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.