Possible Clues:

• Ancient mother goddess
• Org. with a feared black-and-white flag
• Goddess evoked in ''The Magic Flute''
• Egyptian dedicatee of a Pompeii temple
• 'The Keeper of the -- Light', a science fiction novel for young adults by Monica Hughes
• Goldie’s opponent half an hour before the boat race
• Title woman in a 1976 Dylan song
• The river Thames in Oxford
• Egyptian god - or the Thames in Oxford?
• Egyptian goddess whose name consists of the same verb twice