Sound crews taken on board (6)
I believe the answer is:
cruise
'taken on board' is the definition.
The answer and definition can be both to do with motion as well as being verbs in their base form.
Perhaps you can see an association between them that I don't see?
'sound crews' is the wordplay.
'sound' shows a homophone (sound like).
'crews' is a homophone of 'CRUISE'.
Can you help me to learn more?
(Other definitions for cruise that I've seen before include "Sail smoothly" , "Pleasure trip; type of missile" , "Holiday on liner" , "Sail around" , "Sail on a ship" .)