Self-righteous hints from gunsmiths (4)
I believe the answer is:
smug
'self-righteous' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for smug that I've seen before include "Full of oneself" , "Showing excessive self-pride" , "Spruce" , "Unpleasantly complacent" , "Self-satisfied, stuffy" .)