The most common and most likely answer to this crossword clue is the 6 letter word TROOPS
I've seen this crossword clue in The Daily Telegraph
T
R
O
O
P
S
More clues leading to the result TROOPS
- Revolutionary play about old soldiers
- Back street containing inferior soldiers
- Soldiers in play about capturing second in command
- Golf, for example, reversing around old men
- Army kills without error, regularly
- Soldiers needing time on track going north
- Soldiers love to be involved in raising game
- Men shown up in conversations, poor things
- Soldiers needing oxygen in exercise from the south
- Army of Taliban leader on trail, getting comeuppance
Buddy explains!

The straight part
We know that "Men" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case men = troops.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 TROOPS mean?
TROOPS noun- (collective) A collection of people; a number; a multitude (in general).
- A small unit of cavalry or armour commanded by a captain, corresponding to a platoon or company of infantry.
- A detachment of soldiers or police, especially horse artillery, armour, or state troopers.
- Soldiers, military forces (usually "troops").
- A company of stageplayers; a troupe.
- A basic unit of girl or boy scouts, consisting of 6 to 10 youngsters.
- (collective) A group of baboons.
- A particular roll of the drum; a quick march.
- Mushrooms that are in a close group but not close enough to be called a cluster.
- To move in numbers; to come or gather in crowds or troops.
- To march on; to go forward in haste.
- To move or march as if in a crowd.