The most common and most likely answer to this crossword clue is the 6 letter word HAWSES
I've seen this crossword clue in The Guardian
H
A
W
S
E
S
Buddy explains!
The straight part
We know that "Ship’s parts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ship’s parts = hawses.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 HAWSES mean?
HAWSES noun- The part of the bow containing the hawseholes.
- A hawsehole or hawsepipe.
- The horizontal distance or area between an anchored vessel's bows and the actual position of her anchor(s).