Possible Clues:

• Condiment at a sushi bar
• After reflection, I understood about a black and green foodstuff
• Condiment often applied with chopsticks
• 2018 Little Mix song said to be inspired by observed sushi consumption
• Strong-tasting Japanese plant
• Pickled ginger's neighbor, often
• Cook may need this when sailor's in the West End
• Hot stuff has the cutting-edge backing Alberta for second time
• Accompaniment to sushi: was sailor given one?
• Did you see me scoffing a black, edible root?