The most common and most likely answer to this crossword clue is the 9 letter word MARMOSETS
I've seen this crossword clue in The Daily Telegraph
M
A
R
M
O
S
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S
More clues leading to the result MARMOSETS
Buddy explains!
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 = marmosets.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 MARMOSETS mean?
MARMOSETS noun- A small monkey, now specifically a Central and South American monkey of the genera Callithrix, Mico, Cebuella, or Callibella, with claws instead of nails, and a rather primitive layout.
- A hideous figure; a grotesque.
- An unappealing or foolish man.