The Clue Antacid brand that "gets to work in 6 seconds"
The Answer ENO
The answer to the crossword clue is "ENO." ENO is a well-known antacid brand that is famous for its quick relief from heartburn and indigestion. Their advertising claims that it starts working in just six seconds, which makes it a popular choice for those seeking fast relief. The name "ENO" fits perfectly with the clue provided.