The most common and most likely answer to this crossword clue is the 4 plus 4 letter word DEAD ENDS
I've seen this crossword clue in Financial Times
D
E
A
D
E
N
D
S
More clues leading to the result DEAD ENDS
Buddy explains!

The straight part
We know that "they won’t get you anywhere" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case they won’t get you anywhere = dead ends.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 DEAD ENDS mean?
DEAD ENDS noun- A road with no exit.
- (by extension) A position that offers no hope of progress.
- To come to a dead-end.