The most common and most likely answer to this crossword clue is the 3 plus 2 plus 3 plus 8 letter word OUT OF THE ORDINARY
O
U
T
O
F
T
H
E
O
R
D
I
N
A
R
Y
Buddy explains!
The straight part
We know that "unusual" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unusual = out of the ordinary.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.