The phrase "clementine horseradish" is commonly used as a way of expressing your resistance to giving away information. Many also use it to express confusion.
Friend: Do you know what the answer for #6 was on the homework?
You: clementine horseradish...
Friend: Please?
You: clementine horseradish.
Friend: Okay :(
The phrase "clementine horseradish" is most commonly used to express feelings of resistance. It may also be used to express confusion under the correct circumstances.
Friend: What's the answer for number 6?
Me: clementine horseradish
Friend: Please?
Me: clementine horseradish...
Friend: Okay :(