The most common and most likely answer to this crossword clue is the 7 letter word ACCOSTS
I've seen this crossword clue in Financial Times
A
C
C
O
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More clues leading to the result ACCOSTS
Buddy explains!

The straight part
We know that "Confrontationally attacks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case confrontationally attacks = accosts.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 ACCOSTS mean?
ACCOSTS noun- Address; greeting.
- An attack.
- To approach and speak to boldly or aggressively, as with a demand or request.
- To join side to side; to border.
- (by extension) To sail along the coast or side of.
- To approach; to come up to.
- To speak to first; to address; to greet.
- To adjoin; to lie alongside.
- To assault.
- To solicit sexually.