I'm unsure what sort of clutch actuation-mechanism a TR has.
If it is hydraulic, you could have blown a seal on either the slave or master cylinder. Check around each end of the clutch mechanism (ie at the pedal end & at the clucth end) for signs of fluid leakage. Alternatively you could have run low on fluid & developed an air-lock - check the clutch fluid level & top-up & bleed.
If it is cable / mechanical, something may have gone awry with the linkage - check the pedal connection & at the clutch housing for problems such as missing pins, bolts, etc. What about checking the cable slack & adjusting it (if this is available)?
Finally, is the pedal-feel different to before? Softer, longer-travel, quiter/noisier?
You could have always just gone through the last of the frictional material on the clutch plate
but you'd usually get some warning of this - high clutch pedal, excess slippage, etc.