The most common and most likely answer to this crossword clue is the 7 letter word SAINTLY
I've seen this crossword clue in The Times
S
A
I
N
T
L
Y
More clues leading to the result SAINTLY
- Sneaky round is not very good
- Being virtuous is not commonly involved in being devious
- Holy Grail ultimately isn’t a hit? That’s unknown
- Cunning gags aren’t very good
- Like John, Paul or George, isn’t taken in by cunning
- Very good, for instance, to trap build-up of lint
- Arch bridges are not perfect
- Isn’t taken in by cunning? Very good
- Like a fox, inwardly isn’t very good
- ‘Howards End’ is not broadly speaking extremely literary or very good
Buddy explains!

The straight part
We know that "very good" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case very good = saintly.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 SAINTLY mean?
SAINTLY adjective- Like or characteristic of a saint; befitting a holy person; saintlike.