I also get this noise. Renault have assured me the other day it is nothing to worry about and is more audible on some cars than others. It puzzled me to begin with too.
there is also a switch on the clutch pedal for the push button start - it will start if the clutch pedal is depressed instead of the brake pedal - the click could be from this switch
When mine is hot and I have been giving a bit of 'stick' I get a noise when changing gear at high revs. Just looked on youtube at a video and people have said it's normal. Something to do with the gearbox or clutch. Renault make some strange noises! Lol! My clutch pedal feels loose, and clunks if you depress it slightly off going straight down with it.