Ace travelling to Saturn? One usually goes less far! (9)
I believe the answer is:
astronaut
'one usually goes less far' is the definition.
I can't tell whether this definition defines the answer.
'ace travelling to saturn?' is the wordplay.
'ace' becomes 'a' (abbreviation).
'travelling' indicates an anagram.
'to'+'saturn'='tosaturn'
'tosaturn' anagrammed gives 'stronaut'.
'a'+'stronaut'='ASTRONAUT'
Can you help me to learn more?
(Other definitions for astronaut that I've seen before include "High-flier" , "Person trained to travel in a spacecraft" , "heavenly voyager" , "High-flyer" , "Buzz Aldrin, for example" .)