The phrase "a clash about" is correct and usable in written English.
It can be used to describe a disagreement or conflict regarding a specific topic or issue.
Example: "The debate turned into a clash about the best approach to climate change."
Alternatives: "a conflict over" or "a dispute regarding".
It is a clash about civilisation.
In a clash about 12 miles away, 10 soldiers and dozens of militants were reported killed.
Instead it is what Mr Blair calls "a clash about civilisation" that pits progress against reaction around the world.
What started as the dubious drug bust of a beloved, elderly Mill Valley merchant — a case that rattled many in this bucolic burb — is morphing into a clash about vegetarian rights.
Tony Blair has marked the third anniversary of the war on Iraq with his most combative defence yet of the conflict, declaring victory there to be part of "a clash about civilisation".
Despite her recent trials and tribulations, Britney Spears has somehow managed to carve out an interesting online presence, memorably taking down Iggy Azalea after a clash about promotional commitments for their appalling duet, Pretty Girls.
Security forces shot and killed a 15-year-old girl on Wednesday during a clash with about 200 villagers armed with axes and crossbows in eastern Cambodia, in the latest of several violent evictions aimed at clearing land for development.
A clash between about 200 migrants trying to get to Britain from the northern French port city of Calais left seven injured early on Saturday.
A clash is about to take place on the capital's streets that sees the old pitted against the new.
Today the lead movements of opposition are Islamist and, in their most extreme versions, seek to cast the battle of east and west not as a political clash about imperialism but as a holy war.
There is also a building clash about how Labour ought to talk about specifics of the Cameron deal.
