The most common and most likely answer to this crossword clue is the 9 letter word COPYBOOKS
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Buddy explains!
The straight part
We know that "Models of perfection" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case models of perfection = copybooks.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 COPYBOOKS mean?
COPYBOOKS noun- A student's exercise book containing samples of good handwriting to be copied.
- A notebook containing blank, often lined, pages for writing answers.
- A series of instructions or data definitions copied into multiple programs from a shared library; boilerplate.