The most common and most likely answer to this crossword clue is the 8 letter word SLANGING
I've seen this crossword clue in The Sunday Telegraph
S
L
A
N
G
I
N
G
Buddy explains!

The straight part
We know that "attacking abusively" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case attacking abusively = slanging.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 SLANGING mean?
SLANGING verb- To vocally abuse, or shout at.
- To sell (especially illegal drugs).