The most common and most likely answer to this crossword clue is the 11 letter word APOSTROPHES
I've seen this crossword clue in Financial Times
A
P
O
S
T
R
O
P
H
E
S
More clues leading to the result APOSTROPHES
Buddy explains!
The straight part
We know that "in Eastender’s and Neighbour’s?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case in eastender’s and neighbour’s? = apostrophes.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 APOSTROPHES mean?
APOSTROPHES noun- The text character ’, which serves as a punctuation mark in various languages and as a diacritical mark in certain rare contexts.
- A sudden exclamatory piece of dialogue addressed to someone or something, especially absent.