Mostly pay attention to boss (4)

I believe the answer is:

stud

I'm a little stuck... Click here to teach me more about this clue!

'to boss' is the definition.
(both can mean a metal decoration)

I don't understand the rest of the clue.

(Other definitions for stud that I've seen before include "Large-headed piece of metal - horse-breeding establishment" , "Breeding stable" , "Decorative round-headed nail" , "A horse breeding farm" , "Playboy" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.