The most common and most likely answer to this crossword clue is the 7 letter word CRITICS
I've seen this crossword clue in The Daily Telegraph
C
R
I
T
I
C
S
More clues leading to the result CRITICS
Buddy explains!

The straight part
We know that "they’ll no doubt find faults" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case they’ll no doubt find faults = critics.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 CRITICS mean?
CRITICS noun- A person who appraises the works of others.
- A specialist in judging works of art.
- One who criticizes; a person who finds fault.
- An opponent.
- The art of criticism.
- An essay in which another piece of work is criticised, reviewed, etc.
- A point made to criticize something.
- A critic; one who criticises.