The most common and most likely answer to this crossword clue is the 9 letter word COPACETIC
C
O
P
A
C
E
T
I
C
Buddy explains!
The straight part
We know that "Peachy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case peachy = copacetic.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 COPACETIC mean?
COPACETIC adjective- Fine, excellent, OK, in excellent order.