The most common and most likely answer to this crossword clue is the 8 letter word LIGHTERS
I've seen this crossword clue in The Times
L
I
G
H
T
E
R
S
Buddy explains!
The straight part
We know that "Boats" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case boats = lighters.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 LIGHTERS mean?
LIGHTERS noun- One who, or that which, lights.
- A small, reusable handheld device for creating fire, especially for lighting cigarettes.
- A flat-bottomed boat for carrying heavy loads across short distances (especially for canals or for loading or unloading larger boats).