The most common and most likely answer to this crossword clue is the 6 letter word OARING
I've seen this crossword clue in The Guardian
O
A
R
I
N
G
More clues leading to the result OARING
Buddy explains!

The straight part
We know that "Having a row" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case having a row = oaring.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 OARING mean?
OARING verb- To row; to travel with, or as if with, oars.