The most common and most likely answer to this crossword clue is the 7 letter word WARFARE
I've seen this crossword clue in The Daily Telegraph
W
A
R
F
A
R
E
More clues leading to the result WARFARE
- Sent back uncooked food, creating conflict
- Pottery broken by remote conflict
- Yorkshire waterways reported as source of conflict
- … fighting to report atmosphere in docklands?
- Fighting soldiers’ rations?
- Conflict over military rations?
- Good about distant hostilities
- Foremost of westerners are hosting distant conflict
Buddy explains!

The straight part
We know that "Fighting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fighting = warfare.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 WARFARE mean?
WARFARE noun- The waging of war or armed conflict against an enemy.
- Military operations of some particular kind e.g. guerrilla warfare.
- To lead a military life; to carry on continual wars.