The most common and most likely answer to this crossword clue is the 6 letter word ROQUET
I've seen this crossword clue in Financial Times
R
O
Q
U
E
T
Buddy explains!
The straight part
We know that "stroke" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stroke = roquet.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 ROQUET mean?
ROQUET noun- In croquet, the act of hitting another live ball with the striker's ball, from which croquet is then taken.
- In croquet, to hit another live ball with the striker's ball, from which croquet is then taken.