The most common and most likely answer to this crossword clue is the 9 letter word ATHLETICS
I've seen this crossword clue in The Times
A
T
H
L
E
T
I
C
S
More clues leading to the result ATHLETICS
- Satchel, it’s adapted for sport
- Castle hit – destroyed for sport
- Celeb initially involved with A-list – the runs a big feature of this
- What could be running Wigan and Oldham?
- Title cash disbursed in sporting event
- His cattle wandered on the track, perhaps
- His cattle disrupted sport
- Partly track shameful cheat list
- Lithe acts, perhaps
- Sports distressed satchel with note inside
Buddy explains!

The straight part
We know that "sport" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sport = athletics.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 ATHLETICS mean?
ATHLETICS noun- (especially Britain) A group of sporting activities including track and field, road running, cross country and racewalking.
- (especially US) Physical activities such as sports and games requiring stamina, fitness and skill.