The most common and most likely answer to this crossword clue is the 7 letter word SORTIES
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More clues leading to the result SORTIES
Buddy explains!

The straight part
We know that "Attacks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case attacks = sorties.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 SORTIES mean?
SORTIES noun- An attack made by troops from a besieged position.
- An operational flight carried out by a single military aircraft.
- An attacking move
- To sally.