Prink (5)
'prink' is the definition.
(I know that preen is a more specific form of the action prink)
This is all the clue.
(Other definitions for preen that I've seen before include "Groom elaborately" , "Tidy/clean (feathers)" , "Dress with elaborate care" , "Congratulate (oneself); attend to dress" , "(Of a bird) tidy and clean feathers" .)
(Other definitions for sting that I've seen before include "Smart - swindle" , "viz. Gordon Sumner" , "Hurt; smart" , "Bee's weapon" , "Tingle sharply" .)