The most common and most likely answer to this crossword clue is the 8 letter word SAWN-OFF
I've seen this crossword clue in The Guardian
S
A
W
N
-
O
F
F
More clues leading to the result SAWN-OFF
Buddy explains!

The straight part
We know that "short" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case short = sawn-off.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.
Crossword Answer definitions
SAWN-OFF noun- Sawn-off shotgun