Cryptic crossword clue
Neutralising chemical: two animals elected to drink it 9

The most common and most likely answer to this crossword clue is the 9 letter word ANTITOXIN

I've seen this crossword clue in The Guardian
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Buddy explains!

The straight part
We know that "Neutralising chemical" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case neutralising chemical = antitoxin.
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 ANTITOXIN mean?

ANTITOXIN noun
  1. An antibody that is capable of neutralising specific toxins that are causative agents of disease.

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