your problem sounds weird.
heres the break down:
if the springs on the clutch disk were broken, it'll be always be engage, as in you couldnt sit at idle with 1st gear in, car will keep rolling or stall out.
-same thing goes for throw out bearing and pressure plate
if it was clutch master cylinder, it'll do the same thing in each gear ( not enough pressure to engage the clutch )
as of the tranny, if not enough fluid, it'll grind and do it in each gear.

this only happen in the morning? or anytime during the day?
you've checked clutch and tranny fluid correct?