A Roman road beguiles, they say? I'll take a higher route! (8)
I believe the answer is:
aviatrix
'say? i'll take a higher route' is the definition.
I can't judge whether this defines the answer.
'a roman road beguiles they' is the wordplay.
'roman road' becomes 'via' (I've seen this before).
'beguiles they' becomes 'trix' (I can't explain this - if you can you should believe this answer much more).
'a'+'via'+'trix'='AVIATRIX'
Can you help me to learn more?
(Other definitions for aviatrix that I've seen before include "A female pilot in early days of flying" , "eg Amy Johnson" , "Female flier" , "She flies" , "Pioneer travelling" .)