The most common and most likely answer to this crossword clue is the 3 plus 6 letter word ICE HOCKEY
I've seen this crossword clue in The Sunday Telegraph
I
C
E
H
O
C
K
E
Y
More clues leading to the result ICE HOCKEY
- Awkward choice ahead of crucial game
- Sport legend on choice when playing
- Chill wine to go with last bits of turkey and cold game
- Varied choice essential in popular sport in Canada etc
- Wrong choice crucial in this sport
- Wrong choice before important game
- Key choice when playing sport
- Awkward choice ahead of important game
Buddy explains!

The straight part
We know that "this sport" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case this sport = ice hockey.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.