Is there anything else not working?

The radio has two power inputs. The main power input goes 'on' and 'off' with the ignition. However, the clock would need constant power and therefore has it own, separate, power that is always 'on'. I wonder if that circuit is dead (blown fuse?)?

Best single LD trip: 35.3mpg

Everything else is working. I will check and see if it is a fuse.