Ride in space (5)
I believe the answer is:
sally
'ride in space' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sally that I've seen before include "Sortie; witty retort" , "excursion" , "Sarah might make a witty remark about the willow" , "Witty riposte" , "- - Lunn, flat cake" .)