The most common and most likely answer to this crossword clue is the 5 letter word RUGBY
I've seen this crossword clue in Independent
R
U
G
B
Y
More clues leading to the result RUGBY
- Floor-covering laid on by Warwickshire school
- Game of golf needing fortieth round
- Good breaking stone in game
- Girl embracing golf as a game
- Goalkeeper's cap in red for game
- School sport?
- Red clothing good for sport
- Wig on in accordance with sport
- Origin of game’s inscribed in stone here
- Sport finally sliding into red
Buddy explains!

The straight part
We know that "School/sport" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case school/sport = rugby.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 RUGBY mean?
RUGBY noun- (usually uncountable) A form of football in which players can hold or kick an ovoid ball. The ball cannot be handled forwards and points are scored by touching the ball to the ground in the area past their opponent’s territory or kicking the ball between goalposts and over a crossbar.
- A loose fitting shirt with a collar, as worn by rugby players.
- Rubber cement, contact cement.