The most common and most likely answer to this crossword clue is the 11 letter word ONE-REELERS
I've seen this crossword clue in The Guardian
O
N
E
-
R
E
E
L
E
R
S
Buddy explains!
The straight part
We know that "shorts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case shorts = one-reelers.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.