The most common and most likely answer to this crossword clue is the 4 letter word CAIN
C
A
I
N
More clues leading to the result CAIN
- Fratricide — one in place of confinement
- Murderer I put in prison
- Murderer taking taxi home after disposing of bishop
- Actor Michael inadequate as a murderer
- Murderer one found in prison
- Fratricide put one in jail
- Setter in jail with 23’s killer
- Murderer in hut, concealing body initially
- One in jail — he killed his brother
- Fratricide’s punishment is pronounced
Buddy explains!

The straight part
We know that "Fratricide" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fratricide = cain.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.