The most common and most likely answer to this crossword clue is the 5 letter word CLASH
I've seen this crossword clue in The Guardian
C
L
A
S
H
More clues leading to the result CLASH
- Argue about pound coins
- Pound is put in money jar
- Pound in money jar
- Don’t go and whip on Eric’s bottom
- Pound in banknotes and coins producing conflict
- Jar in which pound may be kept in ready money
- Bread gets left inside jar
- Disagree with Conservative whip
- Outbreak of fighting heading for cup tie
- Money’s left in jar
Buddy explains!

The straight part
We know that "jar/jar" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case jar/jar = clash.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 CLASH mean?
CLASH noun- A loud sound, like the crashing together of metal objects.
- A skirmish, a hostile encounter.
- A match; a game between two sides.
- An angry argument
- Opposition; contradiction; such as between differing or contending interests, views, purposes etc.
- A combination of garments that do not look good together, especially because of conflicting colours.
- An instance of restarting the game after a "dead ball", where it is dropped between two opposing players, who can fight for possession.
- Chatter; gossip; idle talk.
- To make a clashing sound.
- To cause to make a clashing sound.
- To come into violent conflict.
- To argue angrily.
- (in games or sports) To face each other in an important game.
- (of clothes, decor, colours) To fail to look good together; to contrast unattractively; to fail to harmonize.
- (of events) To coincide, to happen at the same time, thereby rendering it impossible to attend all.
- To chatter or gossip.