Boss getting apprentices half-cut (4)
I believe the answer is:
stud
'boss' is the definition.
(both can mean a metal decoration)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for stud that I've seen before include "Knob; fastener; boss" , "Playboy" , "gambling with cards" , "Collar button or horse farm" , "Horse-breeding farm" .)