Cryptic crossword clue
Units having worries around eastern edge of battlefield 6

The most common and most likely answer to this crossword clue is the 6 letter word CADRES

I've seen this crossword clue in The Daily Telegraph
C
A
D
R
E
S

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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 CADRES mean?

CADRES noun
  1. A frame or framework.
  2. The framework or skeleton upon which a new regiment is to be formed; the officers of a regiment forming the staff.
  3. The core of a managing group, or a member of such a group.
  4. A small group of people specially trained for a particular purpose or profession.

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