Sunset direction (4)
I believe the answer is:
west
'sunset direction' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for west that I've seen before include "One Direction" , "Dog (from Argyll?)" , "Colombian with brews (anag)" , "The cardinal compass point of 270 degrees" , "'Go ___ , young man'" .)