The most common and most likely answer to this crossword clue is the 8 letter word VIOLENCE
I've seen this crossword clue in Financial Times
V
I
O
L
E
N
C
E
More clues leading to the result VIOLENCE
- Force instrument on ex-vice president — no pressure!
- Force instrument on Trump’s powerless sidekick
- Answer extracted from girl in French church with unjustifiable force
- Fighting failing to impress Labour leader, one struggling to contain it?
- Old man into wickedness and aggression
- Cable television dishing out bestial programme of brutality
- Aggro as the French start to natter in subtly different voice
- Fighting in church after bad name over nothing
- Force Vincent to arrest Leo, possibly
- Vincent accepts Leo running wild in brutality
Buddy explains!
The straight part
We know that "aggression" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case aggression = violence.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 VIOLENCE mean?
VIOLENCE noun- Extreme force.
- Action which causes destruction, pain, or suffering.
- Widespread fighting.
- Injustice, wrong.
- Ravishment; rape; violation
- To subject to violence.