The most common and most likely answer to this crossword clue is the 5 letter word LYSIN
L
Y
S
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N
More clues leading to the result LYSIN
Buddy explains!
The straight part
We know that "Antibody" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case antibody = lysin.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 LYSIN mean?
LYSIN noun- Any substance or antibody that can cause the destruction (by lysis) of blood cells, bacteria etc