The most common and most likely answer to this crossword clue is the 10 letter word SPEEDBOATS
I've seen this crossword clue in The Daily Telegraph
S
P
E
E
D
B
O
A
T
S
Buddy explains!

The straight part
We know that "crafts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case crafts = speedboats.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 SPEEDBOATS mean?
SPEEDBOATS noun- A fast boat, usually small (for 1-8 people).
- A boat designed and built for racing.
- A boat used for waterskiing.