What are the symptoms?
Is it the bracket which mounts to the top of the clutch pedal box? You usually get a horrible feeling clutch, followed by hard to get gears, followed by no clutch at all. If so I think there is a how to section on this site. The upper mount pedal box mount is bolted to a welded bracket on the firewall high up under the dash.
If it is this that has fatigued, it is fairly involved, and requires some welding to put right.
Oh, it's really worth getting a clutch support bracket when you are done...that will help prevent it happening again.