Potent male boss (4)

I believe the answer is:

stud

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This clue could be a double definition.

'potent male' is the first definition.
'stud' can be an answer for 'male' (stud is a kind of male). I am unsure of the 'potent' bit.

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

Can you help me to learn more?

(Other definitions for stud that I've seen before include "Specified arrangement" , "Group of horses for breeding" , "Breeding stable" , "Collar button or horse farm" , "card game" .)

I've seen this clue in The Guardian.

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