The most common and most likely answer to this crossword clue is the 8 letter word AUTOBAHN
I've seen this crossword clue in Independent
A
U
T
O
B
A
H
N
More clues leading to the result AUTOBAHN
- One way the Germans drive out a crazy husband, covered by veto
- Not a hub, a foreign motorway
- About an hour changing motorway
- Hunt a boa slithering around German motorway
- U-boat damaged, initially holed in a north German route
- Oban and Utah combining to build fast transport link
- Where cars race about madly, dashing at intervals
- Road motor shows muscle reversing on deserted hairpin
- A U-boat, to begin with, has never exploded in German transport lanes
- Golf in Germany might adopt this fast course?
Buddy explains!

The straight part
We know that "fast transport link" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fast transport link = autobahn.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 AUTOBAHN mean?
AUTOBAHN noun- The high-speed intercity highways of Germany.