The most common and most likely answer to this crossword clue is the 11 letter word TRANSLATION
I've seen this crossword clue in Independent
T
R
A
N
S
L
A
T
I
O
N
Buddy explains!

The straight part
We know that "E.g. 3’s 11" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case e.g. 3’s 11 = translation.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 TRANSLATION mean?
TRANSLATION noun- The act of translating, in its various senses:
- The product or end result of an act of translating, in its various senses.