Cryptic crossword clue
Writes in code to an anarchic group from the East 7

The most common and most likely answer to this crossword clue is the 7 letter word NOTATES

I've seen this crossword clue in The Daily Telegraph
N
O
T
A
T
E
S

Buddy explains!

The straight part
We know that "Writes in code" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case writes in code = notates.
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 NOTATES mean?

NOTATES verb
  1. To mark with spots or lines, which are often colored.
  2. To add notes to; to annotate
  3. To create notation (i.e. music); to record/put down in the form of notation

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