The most common and most likely answer to this crossword clue is the 9 letter word SHIPOWNER
S
H
I
P
O
W
N
E
R
More clues leading to the result SHIPOWNER
- Sniper who shot one with floating assets?
- His new right to keep name gets man over the line
- Boatman sporting black eye when punched by prisoner
- Newish pro, unusual person possessing craft
- How’s rep dancing along with In the Navy?
- Onassis, perhaps, captive in the sun?
- At sea, person with less time to find big fish in the main?
- Tycoon given black eye boxing … jump to draw conclusions
- Keeping close to Usain, his incredible strength gets man over the line
- How sniper shot dockside V.I.P.
Buddy explains!

The straight part
We know that "man over the line" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case man over the line = shipowner.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 SHIPOWNER mean?
SHIPOWNER noun- Someone who owns a ship.