The most common and most likely answer to this crossword clue is the 8 letter word RATTLERS
I've seen this crossword clue in The Daily Telegraph
R
A
T
T
L
E
R
S
More clues leading to the result RATTLERS
Buddy explains!
The straight part
We know that "Snakes/excellent specimens" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case snakes/excellent specimens = rattlers.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 RATTLERS mean?
RATTLERS noun- Anything that rattles.
- A rattlesnake.
- A freight train or, , a decrepit passenger train.
- A loud, inconsiderate talker.
- A stunning blow.
- An impudent lie; a whopper.