I have a worksheet called puzzle 21 Super Challenge. It's from Crossmatics, Dale Seymour Publications and it's page number is 21.

Anyways, I don't understand what it means when it says see 4-across.

What does that mean?

That means that the answer to clue 4 Across has something to do with the other word or number.

I still don't understand.

What is the clue for 4 Across?

What is the clue that refers to that?

I need help with crossmatics puzzle 7

When a puzzle clue says "see X-across," it means that the answer to the current clue can be found in the across direction of the puzzle grid, specifically at the specified clue number. In your case, when it says "see 4-across," you should look for the clue number 4 in the across direction to find the answer that is related to your current clue. Typically, the clue numbers are placed at the beginning of each across or down clue to help you navigate the puzzle and find the corresponding answers.