The most common and most likely answer to this crossword clue is the 5 letter word TREKS
I've seen this crossword clue in The Daily Telegraph
T
R
E
K
S
More clues leading to the result TREKS
Buddy explains!

The straight part
We know that "Journeys" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case journeys = treks.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TREKS mean?
TREKS noun- A journey by ox wagon.
- The Boer migration of 1835-1837.
- A slow or difficult journey.
- A long walk.
- To make a slow or arduous journey.
- To journey on foot, especially to hike through mountainous areas.
- To travel by ox wagon.