The most common and most likely answer to this crossword clue is the 7 letter word TAURINE
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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 TAURINE mean?
TAURINE adjective- Pertaining to a bull; bull-like.
- An amino-sulfonic acid, NH2CH2CH2SO3H, that has regulatory functions in mammals.