Doctor West arises in vision (5)
I believe the answer is:
dream
'vision' is the definition.
(dream is a kind of vision)
'doctor west arises' is the wordplay.
I cannot really see how this works, but
'doctor' could be 'dr' (abbreviation) and 'dr' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for dream that I've seen before include "person to good to be true" , "Sleeping experience" , "Sleeping thoughts" , "Reverie or nightmare" , "Think vaguely" .)