Clutch disengagement adjustment

There is most likely one or more adjustments for your clutch depending on what make and model of tractor and what options came with it. The most common is a Jinma or derivative with a two stage clutch for a live PTO. There would be 3 different adjustments on that style of clutch.

The symptom you describe does not usually indicate an out of adjustment condition. The first and easiest thing to check is the roll pin that connects the bell-crank to the shaft that goes through the bell housing. This is a known weak point on Jinma tractors. The roll pin can shear off internally and it is hard to detect from the outside.

With no pressure on the clutch pedal, make a witness mark across the end of the shaft and the bell-crank. Use a marking pin, some paint or just scribe a line.  Then have a helper push the clutch pedal all the way in while carefully watching the witness mark. Any movement between the shaft and the bell-crank indicates a problem with the roll pin.

If that all looks OK, you are going to need to take the inspection plate (or the front end loader bracket) off and have a look inside to see what is going on. You need this access to make the internal adjustments anyway.

Do you have the operators and/or parts manuals for your tractor?

one thing related to this I will mention some of these tractors will slightly grind gears when oil is cold and goes away when oil gets to operating temps as with the PTO shaft spinning in neutral when cold, the oil makes a current spinning things but as it thins becomes less. Does the first stage of the clutch seem to work ok? (PTO)