[Kindfiend]

Adjust the cable first and get the correct amount of free play and see if it goes away.
Next simplest is to replace the clutch cable.
Then take it in to have it looked at.
I am afraid they will diagnose something its not just to take it in and replace the whole clutch.
Good Luck.....

^2x Make sure the cable is adjusted and not broken. Generally, the pedal staying to the floor is an indication that the cable is busted or out of adjustment. Then start checking the expensive stuff.