Virile man in poker game (4)
I believe the answer is:
stud
This clue is a double definition.
'virile man' is the first definition.
(I've seen this before)
'poker game' is the second definition.
(I know that stud is a type of poker game)
'in' acts as a link.
(Other definitions for stud that I've seen before include "Sex god" , "gambling with cards" , "Collar button or horse farm" , "sort of stable" , "Part of a football boot" .)