Waves aggressively Crossword Clue

 The answer to the crossword clue "Waves aggressively" is BRANDISH.

To brandish something means to wave it about in a threatening manner. In the context of a crossword puzzle, the clue is likely referring to someone waving a weapon or other object in a threatening way.

Here are some other possible answers to the crossword clue "Waves aggressively":

Flourish

Shake

Wail

Threaten

Swagger

The best answer will depend on the specific context of the crossword puzzle.