The most common and most likely answer to this crossword clue is the 7 letter word LEAGUES
I've seen this crossword clue in The Times
L
E
A
G
U
E
S
More clues leading to the result LEAGUES
- Article in French about fit groups of sportsmen
- Fit into the French competitions
- Unions pass off workmates
- Groups of people – there are about nine in a marathon
- Seagull, a little lost, has energy to fly around for some miles
- Shake a leg before starting to badly use clubs
- Illness caught by the French groups involved in sport?
Buddy explains!

The straight part
We know that "groups involved in sport" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case groups involved in sport = leagues.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 LEAGUES mean?
LEAGUES noun- A group or association of cooperating members.
- An organization of sports teams which play against one another for a championship.
- (often in the negative) A class or type of people or things that are evenly matched or on the same level.
- A prefecture-level administrative unit in Inner Mongolia (Chinese: 盟).
- To form an association; to unite in a league or confederacy; to combine for mutual support.
- (measurement) The distance that a person can walk in one hour, commonly taken to be approximately three English miles (about five kilometers).
- A stone erected near a public road to mark the distance of a league.
- A version of rugby football, played between two teams of thirteen.