The most common and most likely answer to this crossword clue is the 9 letter word BLAMELESS
I've seen this crossword clue in The Times
B
L
A
M
E
L
E
S
S
More clues leading to the result BLAMELESS
Buddy explains!

The straight part
We know that "without fault" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case without fault = blameless.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 BLAMELESS mean?
BLAMELESS adjective- Free from blame; without fault; innocent
- Not meriting blame or censure; undeserving of reproof.