Phrase that’s a real game-changer? Crossword Clue

 The phrase that is a real game-changer in a crossword clue could be:

"Turn the tables" - This phrase means to reverse the situation, so that the one who was previously at a disadvantage is now in control.

"Level the playing field" - This phrase means to make things fair for everyone involved, so that no one has an unfair advantage.

"Break the mold" - This phrase means to do something that is different from what is expected, so that you can create something new and innovative.

"Think outside the box" - This phrase means to come up with new ideas that are not conventional, so that you can solve problems in a new way.

"Change the game" - This phrase means to make a significant improvement or innovation that will revolutionize an industry or field.

The specific phrase that is used in a crossword clue will depend on the context of the clue and the theme of the puzzle. However, these are all phrases that can be considered game-changers in their own way.