Are you sure it is the Clutch ?
Its not the squeeling from a loose fan belt is it?
I'm saying that because when you find the bite on the clutch you will
probabley rev it a little higher, with out even realising.
And the Noise can be from the belt skidding on the pully wheel.
Damp or a loose belt can cause the same results.
What may help is if you Rev it with out doing the clutch thing and see if it makes that noise?
If so its somthing to do with a pully / belt.
If not then you may be right and it is the clutch...
I dont know enough about clutches to help sorry