i think, the fuel consumption will improve with milage, being new to this car maybe you are getting used to the driving pattern as you mentioned that clutch needed some adjustment.
the car is capable to return 20 km per liter for within city commute.
just drive it gently and monitor also the full tank avg using manual method, it shud return 420/430 kms from 20/21 liters of fuel.
also do let us know wat sort of clutch adjustment it needed?