Crossword Genius

Long-distance travellers step right aboard (7)

Ross

I believe the answer is:

spacers

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

'long-distance travellers' is the definition.
(space travellers)

I don't understand the remainder of the clue.

Can you help me to learn more?

I've seen this clue in The Guardian.
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.