The most common and most likely answer to this crossword clue is the 9 letter word TARGETING
I've seen this crossword clue in The Times
T
A
R
G
E
T
I
N
G
Buddy explains!

The straight part
We know that "victimisation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case victimisation = targeting.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.
Crossword Answer definitions
TARGETING verb- To aim something, especially a weapon, at (a target).
- To aim for as an audience or demographic.
- To produce code suitable for.
- An instance of targeting.
- Involved in the transportation or correct positioning of a protein inside or outside a specific region of the cell.