The most common and most likely answer to this crossword clue is the 6 letter word SHRIFT
I've seen this crossword clue in The Guardian
S
H
R
I
F
T
More clues leading to the result SHRIFT
Buddy explains!

The straight part
We know that "which may be short?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case which may be short? = shrift.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 SHRIFT mean?
SHRIFT noun- The act of going to or hearing a religious confession.
- Confession to a priest.
- Forgiveness given by a priest after confession; remission.