Hound in the evening sun (6)
I believe the answer is:
setter
I believe this clue is a double definition.
'hound' is the first definition.
(thesaurus)
'evening sun' is the second definition.
(the sun sets in the evening)
'in the' is the link.
(Other definitions for setter that I've seen before include "A dog trained to stand still when it scents game" , "Dog trained to point at game" , "Bird trained to scent game" , "Mike of this parish, say" , "Canine" .)