Drip under car caused by clutch or something else?

Step #1 is to check–and if necessary, correct–all fluid levels, including the clutch master cylinder.
If there is nothing obviously wrong with fluid levels, then I would suggest that you drop by the Fiat dealership soon.

The car is fully warrantied, and unless abuse or neglect was involved, anything that is wrong will be covered by warranty. Don’t guess. Have the dealership take a look.