The most common and most likely answer to this crossword clue is the 9 letter word SOLDIERLY
I've seen this crossword clue in The Daily Telegraph
S
O
L
D
I
E
R
L
Y
More clues leading to the result SOLDIERLY
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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 SOLDIERLY mean?
SOLDIERLY adjective- In the way of, or appropriate to, a soldier.