Possible Clues:

• New York Knicks' arena: Abbr
• Dim sum additive, perhaps
• Chinese soup additive
• Soup flavor enhancer, for short
• Umami enhancer, for short
• Fast-food additive
• Where the Knicks play, initially
• ''No ---'' (menu phrase in certain restaurants)
• Controversial food additive
• Much-feared (but not actually known to be harmful) Asian food additive