Dog in the evening sun? (6)
I believe the answer is:
setter
I believe this is a double definition.
'dog' is the first definition.
(setter is a type of dog)
'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 "Dog trained to point at game" , "who is giving you problems right now?" , "Puzzle creator" , "Silky-coated gun dog" , "Breed of dog - crossword compiler" .)