Translate CRISPR-Cas9 for a Non-Scientist Audience

You need to explain CRISPR-Cas9 to people with no biology background and not lose them in the first sentence. Name the audience. It translates the mechanism plainly: what CRISPR is, how Cas9 acts as molecular scissors, how guide RNA aims the cut, and how the cell's repair machinery gets redirected. One clear analogy carries the idea so it sticks.

I need to explain the CRISPR-Cas9 gene-editing mechanism to {AUDIENCE} (e.g., a community group, school governors, or policy makers) who have no molecular biology background. Please translate the science into plain language: what CRISPR is, how the Cas9 protein acts like 'molecular scissors', how guide RNA directs the cut, and how the cell's repair machinery is then hijacked to make a desired change. Include one analogy, one concrete medical application, and one ethical consideration worth raising. Keep the total explanation under 300 words.