The most common and most likely answer to this crossword clue is the 8 plus 6 letter word LACROSSE STICKS
I've seen this crossword clue in The Times
L
A
C
R
O
S
S
E
S
T
I
C
K
S
Buddy explains!
The straight part
We know that "sports kit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sports kit = lacrosse sticks.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.