This achievement must be unlocked in Clear The Board mode.
In order to get this achievement, make sure that you have an x1 multiplier for the category when you win a wedge. If you get your multiplier up past x1 by answering a question correctly, miss a question on purpose when you land on that category's Wedge HQ until it's back down to x1, then answer correctly the next time you land on the Wedge HQ.
You'll get the achievement after doing this for each of the 6 wedges, but before you have to answer the Final Question