i think its a slave, master cyl or the clutch line. hopefully for you is the master cyl. look to see if its wet (greeen plastic thing by the pedal.) if by pumping the clutch 5-10 times it solves the issue i think your getting air into the system.
also the fluid could need changing and when cold it can make it hard to get into gear, but i have never had it grind.
i would check the hydralics, bleed the clutch, ect. then look at the fluid level if you don't know how old it is you might as well change it.