Sail about to find a missile (6)

I believe the answer is:

cruise

I'm a little stuck... Click here to teach me more about this clue!

'sail' is the definition.
(I know that cruise is a more specific form of the action sail)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for cruise that I've seen before include "Sail smoothly" , "Sail on a ship" , "Holiday at sea" , "Sea trip" , "Holiday on liner" .)

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.