Yes. After warming up it's expanding slightly, but if you're hearing the change when disengaging the clutch, it's def. something in the clutch system, and the TOB is what makes the noise.
How mechanically inclined are you? Pull the trans and the clutch inspection cover and get the TOB off. Replace with OEM as said, if clutch is working fine then you should be good with just that.
"Fast she goes...in the city of Overdose"