Space rocket with characteristic rings around? (6)

I believe the answer is:

saturn

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

'space rocket' is the definition.
'Saturn' can be an answer for 'rocket' (thesaurus). I am not sure about the 'space' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for saturn that I've seen before include "Roman god - gas giant" , "orbits the sun" , "Titan its moon" , "Solar system planet" , "tried to pass vessel" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app