Dragon-slaying saint (6)
I believe the answer is:
george
'dragon-slaying saint' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for george that I've seen before include "Man rowing on holiday" , "Boy --; -- Clooney" , "Stefan ---, German poet; a Man in a Boat" , "Author of The Mill on the Floss" , "Farming monarch" .)