The most common and most likely answer to this crossword clue is the 11 letter word BATTLEFIELD
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More clues leading to the result BATTLEFIELD
Buddy explains!
The straight part
We know that "where soldiers are active" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case where soldiers are active = battlefield.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 BATTLEFIELD mean?
BATTLEFIELD noun- The area where a land battle is or was fought, which is not necessarily a field.