As a noun:
* The two armies clashed in a fierce battle on the open plains.
* The bright colors of her dress clashed with the muted tones of the room.
* There was a clash of personalities between the two leaders, making collaboration difficult.
As a verb:
* The two musical styles clashed in a jarring way.
* His political views clashed with his family's traditional beliefs.
* The protesters clashed with the police outside the government building.
Figurative language:
* Her red hair clashed with her emerald green eyes, creating a stunning contrast.
* The two ideas clashed in his mind, leaving him unable to make a decision.
The specific meaning of "clash" will depend on the context of the sentence. It can refer to a physical confrontation, a disagreement, a visual conflict, or even a mental struggle.