The most common and most likely answer to this crossword clue is the 9 letter word NOSEBLEED
N
O
S
E
B
L
E
E
D
More clues leading to the result NOSEBLEED
Buddy explains!

The straight part
We know that "Outpouring from snout" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case outpouring from snout = nosebleed.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 NOSEBLEED mean?
NOSEBLEED noun- A haemorrhage from the nose; most specifically, blood flow exiting the nostrils that originates from the nasal cavity.
- A nerd or a geek or a dork