Cryptic crossword clue
People fighting for change turn on sign 15

The most common and most likely answer to this crossword clue is the 15 letter word REVOLUTIONARIES

I've seen this crossword clue in The Daily Telegraph
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Buddy explains!

The straight part
We know that "People fighting for change" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case people fighting for change = revolutionaries.
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 REVOLUTIONARIES mean?

REVOLUTIONARIES noun
  1. A revolutionist; a person who revolts.
  2. , Chopin's 'Revolutionary Etude' Op. 10 no. 12

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