Clamping a brake line is not recommended, as it can cause a number of problems. Clamping a brake line can damage the line, cause the clamp to loosen over time, or create a restriction in the flow of brake fluid. Additionally, clamped brake lines may not provide a secure, leak-proof connection, which can compromise the performance and safety of your brakes. If you need to repair a damaged brake line, it's best to use a compression fitting or a replacement section of brake line. Compression fittings consist of a nut, a sleeve, and a ferrule. When the nut is tightened, it compresses the sleeve onto the brake line, creating a leak-proof seal. Replacement sections of brake line are available in various lengths, and can be connected to the existing line using compression fittings or other types of fittings. When repairing or replacing a section of brake line, it's important to make sure that the fittings are tight and secure, and that the brake line is properly flared before installing the fittings. Additionally, after repairing or replacing a section of brake line, it's important to bleed the brakes to remove any air that may have entered the system. If you're unsure about repairing a brake line, it's best to contact a professional mechanic for assistance. This type of repair should only be performed by a professional as it requires a high level of expertise and can be dangerous if done incorrectly.