Mine does this, usually its oil leaking from the breather pipe (under the top metal cover, next to the distributor) i put one of them hose clips on it, and it stopped. its the oil dripping down onto the manifold and burning off, stick your fingers under their and see if they get covered in oil. Else it could be the clutch, i am on my second clutch now - clio cup 172, just done 69k