The most common and most likely answer to this crossword clue is the 4 letter word FEUD
F
E
U
D
More clues leading to the result FEUD
- Caught, not many would quarrel at length
- Fighter scheduled to return for conflict
- Switch expected following long-standing enmity
- Trouble and strife directly following from behind
- Running battle to get given a meal round university
- Conflict involving France, Spain and united Germany
- Fine payable over row
- Psychoanalyst has no right to take part in ongoing conflict
- Quarrel expected with female showing up
- Quarrel that can be relatively bitter
Buddy explains!

The straight part
We know that "row" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case row = feud.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 FEUD mean?
FEUD noun- A state of long-standing mutual hostility.
- A staged rivalry between wrestlers.
- A combination of kindred to avenge injuries or affronts, done or offered to any of their blood, on the offender and all his race.
- To carry on a feud.
- An estate granted to a vassal by a feudal lord in exchange for service.