The most common and most likely answer to this crossword clue is the 5 letter word SUMOS
S
U
M
O
S
Buddy explains!
The straight part
We know that "Sportsmen" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sportsmen = sumos.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 SUMOS mean?
SUMOS noun- A stylised Japanese form of wrestling in which a wrestler loses if he is forced from the ring, or if any part of his body except the soles of his feet touches the ground.
- A rikishi (sumo wrestler)