That sounds like it could be the thrust bearing (or throw-out bearing it's sometimes called) ..... if it also makes a noise when you rest your foot on the pedal lightly but not enough to actually disengage the clutch then it's probably this.
K
If it's the thrust bearing then it is almost certainly a ring bearing round the input shaft of the gearbox so will need the engine splitting from the gearbox to fit a replacement.
If it is this bearing the good news is that the actual part itself is cheap .... the bad news is that, unless you can do the repair yourself, the labour cost will be a hundred times the cost of the part which is always annoying
