The most common and most likely answer to this crossword clue is the 10 letter word PARATROOPS
I've seen this crossword clue in The Daily Telegraph
P
A
R
A
T
R
O
O
P
S
More clues leading to the result PARATROOPS
- Duty securing a trail withdrawing soldiers
- Trail volunteers returning in pursuit of normal soldiers
- Sorry to stop punishment over harbouring a group of soldiers
- They drop a sport a pro’s compromised
- Soldiers trail army strike in retreat
- A group of sentences about men soldiers dropping from the sky
- Soldiers dropping from the sky broke papa’s rotor
Buddy explains!

The straight part
We know that "soldiers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case soldiers = paratroops.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 PARATROOPS mean?
PARATROOPS noun- Infantry soldiers deployed by parachute