The most common and most likely answer to this crossword clue is the 9 letter word ATTACKERS
I've seen this crossword clue in The Daily Telegraph
A
T
T
A
C
K
E
R
S
More clues leading to the result ATTACKERS
Buddy explains!
The straight part
We know that "Those who criticise" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case those who criticise = attackers.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 ATTACKERS mean?
ATTACKERS noun- Someone who attacks.
- One of the players on a team in football (soccer) in the row nearest to the opposing team's goal, who are therefore principally responsible for scoring goals.