I had a problem very similar to this lately when I installed my new head unit and a bared wire caused *3* fuses to blow. Here were the three that caused my radio and clock (and gauge lights!) to not work:

Underdash fusebox: radio fuse, instrument fuse

Underhood fusebox: "Backup" fuse.

I don't remember the exact amperages of these fuses, it will be easy to check... but the backup fuse until the hood was the one that restored the clock and radio. Hope this helps!