The most common and most likely answer to this crossword clue is the 6 letter word RACOON
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More clues leading to the result RACOON
Buddy explains!

The straight part
We know that "animal" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case animal = racoon.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 RACOON mean?
RACOON noun- A nocturnal omnivore native to North America, typically with a mixture of gray, brown, and black fur, a mask-like marking around the eyes and a striped tail; Procyon lotor.
- Any mammal of the genus Procyon.
- Any mammal of the subfamily Procyoninae, a procyonine.
- Any mammal of the family Procyonidae, a procyonid.