The most common and most likely answer to this crossword clue is the 7 letter word OARSMAN
I've seen this crossword clue in The Guardian
O
A
R
S
M
A
N
More clues leading to the result OARSMAN
- Blade-wielder beheaded sailors held in sultanate
- A Roman senator originally abandoned one on the river
- Blade-wielder beheaded sailors in sultanate
- A ransom organised for rower
- Chap involved in row in Arab country about topless bars
- Stern-looking sport contestant
- A Roman’s at sea — one’s likely to be rowing
- He has a row as Norma breaks down
- Craft worker posed as Roman
- Stroke for timeless sailors in sultanate
Buddy explains!

The straight part
We know that "rower" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rower = oarsman.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 OARSMAN mean?
OARSMAN noun- A man who rows a boat, either alone or with others.