West road rises above base of clouds in visions (6)
I believe the answer is:
dreams
'visions' is the definition.
(dream is a kind of vision)
'west road rises above base of clouds' is the wordplay.
'west' becomes 'mae' (I've seen this before).
'road' becomes 'rd' (abbreviation**).
'rises' says the letters should be written backwards.
'above' is a charade indicator (letters next to each other).
'base of' indicates one should take the final letters.
The final letter of 'clouds' is 's'.
'mae'+'rd'='maerd'
'maerd' in reverse letter order is 'dream'.
'dream'+'s'='DREAMS'
'in' is the link.
(Other definitions for dreams that I've seen before include "Fantasies; fantasises" , "Thoughts and visions during sleep" , "'''We are such stuff as ... are made on'' The Tempest (6)'" , "Imaginings" , "'We are such stuff / As dreams are made on' (The Tempest)" .)