Butchers veal is what you want if you're taking a journey (6)
I believe the answer is:
valise
'what you want if you're taking a journey' is the definition.
I can't judge whether this definition defines the answer.
'butchers veal is' is the wordplay.
'butchers' indicates an anagram (I've seen 'butcher' mean this).
'veal'+'is'='vealis'
'vealis' with letters rearranged gives 'VALISE'.
Can you help me to learn more?
(Other definitions for valise that I've seen before include "A small suitcase for Leavis" , "Small piece of luggage" , "Small overnight bag" , "Elvis A? (anag)" , "Overnight case" .)