To do so, sound crews may be needed (6)

I believe the answer is:

cruise

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'to do' is the definition.
The definition and answer can be both to do with motion as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for cruise that I've seen before include "journey" , "Sail smoothly" , "Pleasure ocean voyage" , "Sea trip" , "Ocean trip taken for pleasure" .)

I've seen this clue in the Evening Standard.

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