Cryptic crossword clue
Smart to include width and length in scientific language 3,5

The most common and most likely answer to this crossword clue is the 3 plus 5 letter word NEW LATIN

I've seen this crossword clue in The Times
N
E
W
L
A
T
I
N

Buddy explains!

The straight part
We know that "scientific language" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case scientific language = new latin.
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.

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