The most common and most likely answer to this crossword clue is the 6 letter word SNARKS
S
N
A
R
K
S
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 SNARKS mean?
SNARKS noun- A graph in which every node has three branches, and the edges cannot be coloured in fewer than four colours without two edges of the same colour meeting at a point.
- A fluke or unrepeatable result or detection in an experiment.