The most common and most likely answer to this crossword clue is the 3 plus 3 letter word FOR ALL
I've seen this crossword clue in The Guardian
F
O
R
A
L
L
Buddy explains!
The straight part
We know that "Universal places to meet some grief or arguments? (3,3)" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case universal places to meet some grief or arguments? (3,3) = for all.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.