The most common and most likely answer to this crossword clue is the 10 letter word DISPATCHER
I've seen this crossword clue in The Times
D
I
S
P
A
T
C
H
E
R
Buddy explains!
The straight part
We know that "Router" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case router = dispatcher.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 DISPATCHER mean?
DISPATCHER noun- A message sent quickly, as a shipment, a prompt settlement of a business, or an important official message sent by a diplomat, or military officer.
- The act of doing something quickly.
- A mission by an emergency response service, typically attend to an emergency in the field.
- The passing on of a message for further processing, especially via a dispatch table.
- A dismissal.
- In a transportation organization, a person who controls the movements of vehicles
- A piece of software responsible for assigning priorities and resources to tasks waiting to be scheduled