The most common and most likely answer to this crossword clue is the 8 letter word SNORTING
I've seen this crossword clue in The Guardian
S
N
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More clues leading to the result SNORTING
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 SNORTING mean?
SNORTING verb- To make a snort; to exhale roughly through the nose.
- To express or force out by snorting.
- To inhale (usually a drug) through the nose.
- To snore.
- (of submarines) To sail at periscope depth through the use of a snort or snorkel.
- A snort sound or action.