Cryptic crossword clue
Every other change neatly arranged 11

The most common and most likely answer to this crossword clue is the 11 letter word ALTERNATELY

I've seen this crossword clue in The Guardian
A
L
T
E
R
N
A
T
E
L
Y

Buddy explains!

The straight part
We know that "Every other" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case every other = alternately.
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 ALTERNATELY mean?

ALTERNATELY adverb
  1. In reciprocal succession; succeeding by turns; in alternate order.
  2. By alternation; when, in a proportion, the antecedent term is compared with antecedent, and consequent.
  3. (sometimes proscribed) Alternatively.

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