The most common and most likely answer to this crossword clue is the 3 letter word OCT
O
C
T
Buddy explains!
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 OCT mean?
OCT noun- The number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7.
- A digit or value in the octal number system.