The most common and most likely answer to this crossword clue is the 9 letter word AARDVARKS
I've seen this crossword clue in Independent
A
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More clues leading to the result AARDVARKS
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The straight part
We know that "Animals" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case animals = aardvarks.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 AARDVARKS mean?
AARDVARKS noun- The nocturnal, insectivorous, burrowing, mammal Orycteropus afer, of the order Tubulidentata, somewhat resembling a pig, common in some parts of sub-Saharan Africa.
- A silly or credulous person who is prone to mistakes or blunders.