Sting is well turned out (5)
I believe the answer is:
smart
This clue is a double definition.
'sting' is the first definition.
(I've seen this before)
'well turned out' is the second definition.
(I've seen this before)
'is' is the link.
(Other definitions for smart that I've seen before include "Neat - clever" , "Fine" , "Clever; sting" , "fly" , "Elegant and stylish" .)