The most common and most likely answer to this crossword clue is the 6 letter word DETOUR
I've seen this crossword clue in The Times
D
E
T
O
U
R
More clues leading to the result DETOUR
- Edward backed our diversion
- Extremely dire, lengthy journey, not a direct route
- Daughter altering route for longer one?
- What gets you routed another way?
- Alternative route after start of digging?
- Go out of your way to be boring about film
- Head to destination by alternative route
- One cannot go straight ahead and make it
- Alternative route after onset of digging?
- It‘s not taken by one going straight
Buddy explains!

The straight part
We know that "not a direct route" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not a direct route = detour.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 DETOUR mean?
DETOUR noun- A diversion or deviation from one's original route.
- To make a detour.
- To direct or send on a detour.