The most common and most likely answer to this crossword clue is the 9 plus 1 letter word CAREFREE} –
C
A
R
E
F
R
E
E
}
â
€
“
Buddy explains!
The straight part
We know that "not concerned?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not concerned? = carefree} –.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 CAREFREE} – mean?
CAREFREE} – adjective- Without cares or worries; free of concern or worries; without difficulty.