The most common and most likely answer to this crossword clue is the 6 letter word TRIVIA
T
R
I
V
I
A
More clues leading to the result TRIVIA
- Begins to receive intelligence by way of pub quiz questions?
- Small beer? Three in combination on the way
- Almost stumble through unimportant stuff
- Minor details of Queen leaving coastal area on time
- Short mistake going through things that don’t matter
- Petty details in dogma I virtually reversed
- Tories really impede leaders by way of irrelevancies
- Matters that don’t?
- Tory, in vain, regularly advanced minutiae
- Endless test featuring four bits of useless information
Buddy explains!

The straight part
We know that "Petty detail" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case petty detail = trivia.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 TRIVIA mean?
TRIVIA noun- Insignificant trifles of little importance, especially items of unimportant information
- A quiz game that involves obscure facts.
- (in medieval universities) The lower division of the liberal arts; grammar, logic and rhetoric.
- The three anterior ambulacra of echinoderms, collectively.