To test your clutch this is what a local mechanic told me. Park the car, engine running, handbrake on - keep the handbrake on throughout the test. Clutch down put the car into 4th (handbrake remains on) release the clutch as you rev the engine (don't go crazy but imagine you're trying to pull away). The car should stall as soon as the clutch is released under this load, if it doesn't then your clutch is probably on its way out.