Kings take this route in London (3)
I believe the answer is:
way
'kings take this route in london' is the definition.
'way' can be an answer for 'route' (way is a kind of route). I'm not sure about the rest of the definition.
This is the entire clue.
Can you help me to learn more?
(Other definitions for way that I've seen before include "Manner; road" , "Path" , "Route; direction" , "Street" , "Method; route" .)