Be given a route of escape (7)
I believe the answer is:
getaway
'escape' is the definition.
(I know that getaway is a type of escape)
'be given a route' is the wordplay.
'be' becomes 'get' (I can't justify this - if you can you should believe this answer much more).
'given' means one lot of letters go next to another.
'route' becomes 'way' (way is a kind of route).
'get'+'a'+'way'='GETAWAY'
'of' is the link.
Can you help me to learn more?
(Other definitions for getaway that I've seen before include "flight" , "Escape" .)