Tuna roast prepared for distant traveller (9)
I believe the answer is:
astronaut
'distant traveller' is the definition.
'astronaut' can be an answer for 'traveller' (astronaut is a kind of traveller). I am unsure of the 'distant' bit.
'tuna roast prepared' is the wordplay.
'prepared' indicates an anagram.
'tuna'+'roast'='tunaroast'
'tunaroast' with letters rearranged gives 'ASTRONAUT'.
'for' is the link.
Can you help me to learn more?
(Other definitions for astronaut that I've seen before include "Person trained to travel in a spacecraft" , "Buzz Aldrin, e.g." , "High-flyer" , "Armstrong or Sharman, say" , "Skier" .)