I would look at the spring as an easy start. Looking at the way it works, it has to have one.
I was under the car the other day, looking at my clutch problem, and there is no other way for the pedal to return, other than the spring in the pedal, and the return pressure form the Clutch pressure plate springs.
Mine has pretty much, always stopped about an inch down, and I have to lift it up with my foot. Then it started sinking to the floor over night.
I took the pedal assembly out, cleaned it up, made new bushes for it, and greased it before putting it back, but still had the same problem.
I then discovered the flexible pipe had gone, so replaced that and the slave cylinder... Ok for a couple of days, then back to the old problem of the clutch pedal stopping an inch down, and having to lift it with my foot.
So the other day, I disconnected the Damper pipe, and blocked off the hole....... Still the same problem.
While I was bleeding the clutch, I noticed that the forks only return to the end of the pressure plate movement, forcing the fluid back out of the slave cylinder, and lifting the pedal, but you can manually move the forks a bit further, and this causes the pedal to return to the top.
So I am wondering if I have a problem in the actual clutch housing, which is probably pretty obvious, in hind sight, since it has always had a rattle coming from the same area, which goes away when you push the clutch pedal down. I Just do not want to think about it now, and will wait for it to go wrong, and hope Mr Greenflag will either take it to a garage, or home for me. Until then, it looks like the weird clutch pedal is added to the list of other Terrano quirks mine has.:doh
Hope yours is easy and just the spring.:thumbs