[ntmatter]

Although it's a bummer, a clutch is a wear part similar to brake pads. To me an analogy would be that after buying the car you're having braking problems, and they replace some sticking calipers under warranty. While they're doing that they discover that the brake pads are low, and they'll replace the brake pads for 50% of the part cost (since they were low when you bought it), and no labor charge since they're putting new calipers on. In that instance, it would seem very reasonable to me to pay for half the part.